USD $5
K&E Ionic 56-3530 Drafting Ruler w/Case
Stock: 1
USD $165
12.5″/10″ Full Size Slide Rule, cream white Ivorite construction with black engraved scales. This is essentially a late version of the 4053 made all of Ivorite like the 4150 series pocket rules, with folded scales, and decimal trig scales related to the C and D scales.
The rule has side rulers in both cm and inches, the back has conversion factors. The rule and cursor are in new/mint condition, but does not include a case. A very interesting rule that marked the serious shift along with the 4181 to Ivorite body design for K+E.
(12 Scales, 2 rulers)
Front – (inch) K, DF, [ CF, L, CI, C, ] D, A (cm)
Back – factors [ T, ST, S, C, ]
Stock: 1
USD $225
6″/5″Pocket Slide Rule
Ivorite, Log Log Duplex Decitrig (also known later as the ‘Jet-Log’, or in this pocket size, the ‘Jet-Log Jr.’) rule, with metal framed unbreakable cursor. White “Ivorite” construction, with engraved black and red scales that include directional tilt for inverse scales. A real powerhouse duplex rule from K+E in a convenient pocket format.
This rule works the same as the earlier and justly famous full sized 4081-3 and 4181-3 rules, but in pocket size. The rule, manual, and case are in new/mint condition, however the box is heavily worn.
(21 Scales)
Front – LL02, LL03, DF, [ CF, CIF, CI, C, ] D, LL3, LL2
Back – LL01, L, K, A, [ B, T, SRT, S, ] D, DI, LL1
Stock: 1
USD $215
12.5″/10″ Full Size Slide Rule
Log Log Duplex Decitrig rule, very late Ivorite body version, excellent example, near mint condition. Late production version of the famous 4081-3, excellent new improved cursor and metalwork. An outstanding and powerful rule, and great addition to any K+E collection. Used rule in excellent condition, includes a replacement Sphere Research Duplex Case.
(21 Scales)
Front – LL02, LL03, DF, [ CF, CIF, CI, C, ] D, LL3, LL2
Back – LL01, L, K, A, [ B, T, SRT, S, ] D, DI, LL1
Stock: 1
USD $195
10″ Log Log Duplex Decitrig Slide Rule, one of K+E’s premiere duplex rules, in the final wood body format, with inlaid wood edges and improved unbreakable cursor. This is another confusing K+E catalog numbering issue, the 68-1220 meant the 68-1210 rule in the green case, but the rule itself is unchanged at 68-1210, and is really the re-named 4081-3. Used rule in excellent condition, comes with a replacement Sphere Research Duplex Case.
(21 Scales)
Front – LL02, LL03, DF, [ CF, CIF, CI, C, ] D, LL3, LL2
Back – LL01, L, K, A [ B, T, SRT, S, ] D, DI, LL1
Stock: 1
USD $185
10″ Log Log Duplex Decitrig Slide Rule one of K+E’s premiere duplex rules, in the inlaid wood edge format. This rule comes with a new nylon Sphere Research.
(21 Scales)
Front – LL02, LL03, DF, [ CF, CIF, CI, C, ] D, LL3, LL2
Back – LL01, L, K, A [ B, T, SRT, S, ] D, DI, LL1
Stock: 1
USD $175
12.5″/10″ Full Size Slide Rule complete with original embossed green slip case. Cream white Ivorite construction with black engraved scales. This is essentially a late version of the 4053 made all of Ivorite like the 4150 series pocket rules, with folded scales, and decimal trig scales related to the C and D scales.
The rule has side rulers in both cm and inches, the back has conversion factors. The rule and cursor are in excellent condition, the case is in good condition, with some folding creases at the top flaps. A very interesting rule that marked the serious shift along with the 4181 to Ivorite body design for K+E.
(12 Scales, 2 rulers)
Front – (inch) K, DF, [ CF, L, CI, C, ] D, A (cm)
Back – factors [ T, ST, S, C, ]
Stock: 1
USD $49
12″/10″ Full Size Slide Rule in updated body format
K+E’s stylish green and white student rule styled to look like a high-end K+E Deci-lon. Engraved scales for ruggedness, and includes vinyl slip case and English factory manual.
These are excellent condition, complete with everything, we pull all of them from the slip cases and clean any release agent off the rule (from the vinyl case). The back of the rule is blank. All have original manuals. The plastic sleeve has the name of the South American distributor stamped on these. These rules have some age discoloration.
(9 Scales)
Front – K, A, [ B, S, CI, T, C ] D, L
Stock: 5
USD $55
12″/10″ Full Size Slide Rule in updated body format
K+E’s stylish green and white student rule styled to look like a high-end K+E Deci-lon. Engraved scales for ruggedness, and includes vinyl slip case and english factory manual.
These are excellent condition, complete with everything, we pull all of them from the slip cases and clean any release agent off the rule (from the vinyl case). The back of the rule is blank. All have original manuals. The plastic sleeve has the name of the South American distributor stamped on these.
(9 Scales)
Front – K, A, [ B, S, CI, T, C ] D, L
Stock: 18
USD $165
10″ Polyphase Duplex Decitrig Slide Rule, one of K+E’s less common duplex rules, with a narrower body than the 4081. Has slanted/red and blue colored directional trig scale markings, and a very good glass cursor. Both rule and case are in excellent condition.
(15 Scales)
Front – DF, [ CF, CIF, CI, C, ] D, L
Back – K, A [ B, T, ST, S, ] D, DI
Stock: 1
USD $185
10″ Polyphase Duplex Slide Rule, in the inlaid wood edge format. This rule is in excellent condition, and the case is in good condition with some minor wear.
(13 Scales)
Front – DF, [CF, CIF, C], D
Back – K, A, [B, S, T, CI], D, L
Stock: 1
USD $135
10″ Full Size Mannheim Slide Rule.
K&E’s most popular Mannheim rule, this is an excellent example of the 4053-3 rule. This simplex rule has both inch and cm side rulers (great to leave parked on your desk!), all standard front/rear scales, plus conversion factors on the rear.
This rule comes with its original black leather case, with K+E logo embossing.
(9 Scales, 2 Rulers)
Front – A, [ B, CI, C, ] D, K
Back – S, L, T plus Conversions.
Stock: 2
USD $85
This K+E pocket rule has an unbreakable improved cursor and white body with black engraved and filled scales. This rule has folded (CF/DF) scales at pi, with the trig scales in decimal degrees. The back is blank, but the slide is reversible with trig scales (T, ST, S, C). The rule is in mint condition, with only minor wear to the edge of the leather slip case.
We also have one in mint condition with an unbranded case in excellent condition.
(12 Scales)
Front – K, DF, CF, L, CI, C, D, A [ T, ST, S, C]
Back – Blank
Stock: 2
USD $125
5″/6″ Polyphase Duplex Pocket Set
K&E Ivorite Body Polyphase Duplex Pocket rule (rule bears only the marking Doric, sometimes identified as 9081-1), with sewn green leather pocket clip case. Rule is in excellent condition, minor wear on the case.
This uncommon K+E pocket rule has an unbreakable improved cursor and white body with black engraved and filled scales. This rule has trig (with minutes/seconds, useful for navigation) and folded scales.
(13 Scales)
Front – DF, [ CF, CI, C, ] D, L
Back – K, A, [ B, ST, S, ] D, T
Stock: 1
USD $69
6″/5″ Pocket Slide Rule
A commerce oriented simplex pocket rule with late unbrekable cursor, complete with dark green leather slip case. This series is the replacement for the earlier 4097 pocket series, which was a very fragile Xylonite design, and not as rugged as the newer Ivorite bodies.
(6 Scales)
Front – DF, [ CF, CI, C, ] D, L
Back – Blank
Stock: 1
USD $35
6″/5″ Pocket Slide Rule
A commerce oriented simplex pocket rule made with the earlier Xylonite body, includes a stitched leather sip case. Rule is in good condition, but shows age discoloration. This series was replaced by the newer 4150 series, that feature the more rugged Ivorite body.
(5 Scales)
Front – DF, [CF, CI, C], D
Back – Blank, 2 Rulers (in. / cm)
Stock: 1
USD $165
12.5″/10″ Full Size Slide Rule
This is the early log log rule from K+E, which still has trig functions in degrees, minutes and seconds (useful for map navigation). Features the newer, metal framed cursor, which indicates the production period of this rule was most likely in the late 1930s. Comes with the original fibreboard case, which is heavily damaged. Rule is in good condition.
(17 Scales)
Front – K, DF, [ CF, CIF, CI, C] D, L
Back – LL0, A, [ B, S, T, C, ] LL3, LL2, LL1
Stock: 1
USD $165
A classic mahogany body rule from K&E in very good condition, featuring scale adjustment clamp screws on the reverse side of the rule for adjusting the friction of the slide.
(7 Scales)
Front – A, [ B, C], D
Back – [ S, L, T], Conversions
Stock: 1
USD $55
A well aged, early model rule from the K&E collection of mahogany bodies wood rules. A beautiful and simple rule for beginners, or for someone looking to round out their collection. Comes with the original fibreboard case.
(7 Scales)
Front – A, [ B, C], D
Back – [ S, L, T], Conversions
Stock: 1
USD $12
Perfect for the draftsman on the go, this pocket ruler features a variety of different measurement scales: 3/4, 1 1/2, 3, 1/8, 1/4, 1/2.
Stock: 1
USD $85
5″/6″ Polyphase Pocket Set
K&E pocket rule with an unbreakable improved cursor and white body with black engraved and filled scales. This rule has sine scale in minutes/seconds (useful for navigation), the back is blank, but the slide is reversible. Includes a leather clip case.
(9 Scales)
Front – A, [ B, CI, C, ] D, K
Back – [ S, L, T]
Stock: 1
USD $8
A pocket scaled ruler from K&E, featuring 10, 20, 40, and 50 ratio scales drafting on the go. Includes K&E embossed leather case.
Stock: 1
USD $225
10″ Log Log Duplex Decitrig Slide Rule, one of K+E’s premiere duplex rules, in the final wood body format, with inlaid wood edges and improved unbreakable cursor. This is another confusing K+E catalog numbering issue, the 68-1220 meant the 68-1210 rule in the green case, but the rule itself is unchanged at 68-1210, and is really the re-named 4081-3. Great metal work, cursor and lenses, beautiful condition set for somebody looking for this high end rule.
(21 Scales)
Front – LL02, LL03, DF, [ CF, CIF, CI, C, ] D, LL3, LL2
Back – LL01, L, K, A [ B, T, SRT, S, ] D, DI, LL1
Stock: 1
USD $175
12″/10″ Full Size Mannheim Slide Rule.
K&E’s most popular Mannheim rule, this 4053-3 rule includes a very rare clip-on cursor magnifier, with the mahogany back, glass cursor, and 2 side rulers. This simplex rule has both inch and cm side rulers (great to leave parked on your desk!), all standard front/rear scales, plus conversion tables on the rear. Enjoyable to use, and lovely to look at.
This rule set comes with an excellent sewn leather case, with K+E logo embossing, built to accommodate the magnifying cursor lens.
(9 Scales, 2 Rulers)
Front – A, [ B, CI, C, ] D, K
Back – S, L, T plus Conversions.
Stock: 1
USD $125
This is a later production run of this rule, featuring the full Ivorite body. A simplex/Manheim rule that is great for students and simpler desk work, featuring metric and imperial rulers on the upper and lower edges. Black and red engraved and filled scales. Both the rule and case are in mint/new condition.
(5 Scales, 2 rulers)
Front – DF, [ CF, CI, C], D
Back – Blank, Conversion factors
Stock: 1
USD $95
5″/6″ Polyphase Pocket Set
K&E pocket rule with an unbreakable improved cursor and white body with black engraved and filled scales. This rule has sine scale in minutes/seconds (useful for navigation), the back is blank, but the slide is reversible. Rule is New In Box, with light wear on the original box.
(9 Scales)
Front – A, [ B, CI, C, ] D, K
Back – [ S, L, T]
Stock: 2
USD $110
A later production, Ivorite body, pocket rule, sold as either a 4168 or 9068 Doric series. This rule is new in box, even the box is in near pristine condition given its age.
(13 Scales)
Front – DF, [CF, CI, C], D, L
Back – K, A, [B, ST, S], D, T
Stock: 1
USD $95
A later production, Ivorite body, pocket rule. This example is in excellent condition with no discernible discoloration or scale bleeding. Includes the original box and leather case.
(13 Scales)
Front – DF, [CF, CI, C], D, L
Back – K, A, [B, ST, S], D, T
Stock: 1
USD $195
10″ Log Log Duplex Decitrig Slide Rule one of K+E’s premiere duplex rules, in the inlaid wood edge format. This rule comes with a black leather case, original manual, and original box. The box is heavily worn, and there is some light marking on the leather case.
(21 Scales)
Front – LL02, LL03, DF, [ CF, CIF, CI, C, ] D, LL3, LL2
Back – LL01, L, K, A [ B, T, SRT, S, ] D, DI, LL1
Stock: 1
USD $225
10″ Polyphase Duplex Decitrig Slide Rule one of K+E’s less common duplex rules, with a narrower body than the 4081. Has slanted/red and blue colored directional trig scale markings, and a very good glass cursor.
Both the rule and case are in new condition, the original box is heavily worn.
(15 Scales)
Front – DF, [ CF, CIF, CI, C, ] D, L
Back – K, A [ B, T, ST, S, ] D, DI
Stock: 1
USD $159
10″ Full Size Mannheim Slide Rule.
K&E’s most popular Mannheim rule, this is a late production set of the famous 4053-3 rule, released under model number 68-1622. This simplex rule has both inch and cm side rulers (great to leave parked on your desk!), all standard front/rear scales, plus conversion factors on the rear.
This rule set comes with an excellent sewn leather case, with K+E logo embossing, a full factory soft-cover manual, care booklet, and a worn original green K+E storage box.
(9 Scales, 2 Rulers)
Front – A, [ B, CI, C, ] D, K
Back – S, L, T plus Conversions.
Stock: 4
USD $185
10″ Polyphase Duplex Slide Rule, in the inlaid wood edge format. This rule comes with its original box, and leather case.
(13 Scales)
Front – DF, [CF, CIF, C], D
Back – K, A, [B, S, T, CI], D, L
Stock: 1
USD $175
10″ Log Log Duplex Decitrig Slide Rule one of K+E’s premiere duplex rules, in the inlaid wood edge format. This rule comes with the green colored, fibre board case.
(21 Scales)
Front – LL02, LL03, DF, [ CF, CIF, CI, C, ] D, LL3, LL2
Back – LL01, L, K, A [ B, T, SRT, S, ] D, DI, LL1
Stock: 1
USD $95
Full size rule with an older, fibre board case that has the model embossed on the top of the flap. Rule is in very good condition for its age.
(14 Scales)
Front – K, A, B, T, ST, S, D, DI
Back – DF, CIF, CI, C, D, L
Stock: 1
USD $69
12″/10″ Full Size Mannheim Slide Rule.
One of K&E’s most popular Mannheim rule, with the mahogany back, glass cursor, and 2 side rulers. This simplex rule has both inch and cm side rulers (great to leave parked on your desk!), all standard front/rear scales, plus conversion tables on the rear. Enjoyable to use, and lovely to look at. Includes the factory original leather case, some discoloration on the face of the rule (common for rules of this age).
(9 Scales, 2 Rulers)
Front – inch / A, [ B, CI, C, ] D, K
Back – S, L, T plus Conversions.
Stock: 1
USD $15
A classic K&E beginner’s slide rule, wood body construction, with four scales, and common references on the reverse side.
(4 Scales)
Front – A, B, C, D
Back – Reference data and formulas
Stock: 1
USD $425
Boxed Set 12″/10″ Deci-lon Slide Rule
Ivorite, Log Log Duplex Decitrig rule, metal framed unbreakable cursor. White “Ivorite” construction, with engraved black and red scales that include directional tilt for inverse trig scales. Complete with original K&E gold embossed orange leather case, display box, belt loop, hardbound book and care booklet.
The Deci-lon has extra dual square/root scales, and range data for log and trig scales on the face. The actual set is pictured, excellent condition.
(26 Scales !!)
Front – Sq1, Sq2, DF, [ CF, CIF, L, CI, C, ] D, Ln0, Ln1, Ln2, Ln3
Back – Ln-3, Ln-2, Ln-1, Ln-0, A, [ B, T, SRT, S, C,] D, DI, K
Stock: 1
USD $59
With only 7 scales, and two rulers, this is a more subtle rule from a more refined time… The gentleman’s pocket rule with its original leather slip case.
(7 Scales, 2 rulers)
Front – A, [B, C], D
Back – [S, L, T]
Stock: 1
USD $185
6″/5″Pocket Slide Rule
Ivorite, Log Log Duplex Decitrig (also known later as the ‘Jet-Log’, or in this pocket size, the ‘Jet-Log Jr.’) rule, with metal framed unbreakable cursor. White “Ivorite” construction, with engraved black and red scales that include directional tilt for inverse scales. A real powerhouse duplex rule from K+E in a convenient pocket format.
This rule works the same as the earlier and justly famous full sized 4081-3 and 4181-3 rules, but in pocket size. A very nice find, and an outstanding pocket rule, certainly the most desirable and requested K+E pocket model.
ONe with green leather clip case with name on the inside, and one in very good condition with ROW punched into the outside of the back flap. ONe with orange leather clip case with name on the clip.
(21 Scales)
Front – LL02, LL03, DF, [ CF, CIF, CI, C, ] D, LL3, LL2
Back – LL01, L, K, A, [ B, T, SRT, S, ] D, DI, LL1
Stock: 7
USD $35
A simpler and smaller pocket rule, made from K&E’s Ivorite, this is a durable and easy rule to use. At home in every suit pocket.
(13 Scales)
Front – DF, [CF, CI, C], D, L
Back – K, A, [B, ST, S], D, T
Stock: 1
USD $79
5″/6″ Polyphase Pocket Set
This K+E pocket rule has an unbreakable improved cursor and white body with black engraved and filled scales. This rule has sine scale in minutes/seconds (useful for navigation), the back is blank, but the slide is reversible. An interesting transitional set.
We currently have this rule in Very Good Condition with original slip cases in either black of orange, and one black slip case.
(9 Scales)
Front – A, [ B, CI, C, ] D, K
Back – [ S, L, T]
Stock: 4
USD $35
6″/5″ Pocket Slide Rule
This is an early model commerce oriented simplex pocket rule, with the early Xylonite body. This rule was later replaced by the 4097 pocket rule, which was made from the more durable Ivorite body. These early rules are harder to find in good condition due to the Xylonite bodies, and this is a good example of the rule. Include sthe original K&E leather slip case.
(11 Scales, 2 rulers)
Front – A, DF, [CF, CI, C], D, K
Back – [S, B, L, T] Metric and imperial rulers
Stock: 4
USD $195
6″/5″Pocket Slide Rule
Ivorite, Log Log Duplex Decitrig (also known later as the ‘Jet-Log’, or in this pocket size, the ‘Jet-Log Jr.’) rule, with metal framed unbreakable cursor. White “Ivorite” construction, with engraved black and red scales that include directional tilt for inverse scales. A real powerhouse duplex rule from K+E in a convenient pocket format.
This rule works the same as the earlier and justly famous full sized 4081-3 and 4181-3 rules, but in pocket size. A very nice find, and an outstanding pocket rule, certainly the most desirable and requested K+E pocket model.
(21 Scales)
Front – LL02, LL03, DF, [ CF, CIF, CI, C, ] D, LL3, LL2
Back – LL01, L, K, A, [ B, T, SRT, S, ] D, DI, LL1
Stock: 3
USD $195
6″/5″Pocket Slide Rule
Ivorite, Log Log Duplex Decitrig (also known later as the ‘Jet-Log’, or in this pocket size, the ‘Jet-Log Jr.’) rule, with metal framed unbreakable cursor. White “Ivorite” construction, with engraved black and red scales that include directional tilt for inverse scales. A real powerhouse duplex rule from K+E in a convenient pocket format.
This rule works the same as the earlier and justly famous full sized 4081-3 and 4181-3 rules, but in pocket size. A very nice find, and an outstanding pocket rule, certainly the most desirable and requested K+E pocket model.
(21 Scales)
Front – LL02, LL03, DF, [ CF, CIF, CI, C, ] D, LL3, LL2
Back – LL01, L, K, A, [ B, T, SRT, S, ] D, DI, LL1
Stock: 1
USD $225
6″/5″Pocket Slide Rule
Ivorite, Log Log Duplex Decitrig (also known later as the ‘Jet-Log’, or in this pocket size, the ‘Jet-Log Jr.’) rule, with metal framed unbreakable cursor. White “Ivorite” construction, with engraved black and red scales that include directional tilt for inverse scales. Includes original K&E gold embossed orange leather clip case in excellent condition. A real powerhouse duplex rule from K+E in a convenient pocket format. The set includes a clip case and rule.
This rule works the same as the earlier and justly famous full sized 4081-3 and 4181-3 rules, but in pocket size. A very nice find, and an outstanding pocket rule, certainly the most desirable and requested K+E pocket model.
(21 Scales)
Front – LL02, LL03, DF, [ CF, CIF, CI, C, ] D, LL3, LL2
Back – LL01, L, K, A, [ B, T, SRT, S, ] D, DI, LL1
Stock: 1
USD $225
5″/6″ Jet Log Pocket Rule
A very attractive rule with its original K&E leather clip case. With 20 scales, this is one of the more powerful pocket rules featuring the early model ivorite bodies.
(20 Scales!)
Front – LL02, LL03, DF, [CF, CI, C], D LL3, LL2
Back – LL01, L, K, A, [B, T, SRT, S], D, DI, LL1
Stock: 1
USD $69
6″/5″ Pocket Slide Rule
A commerce oriented simplex pocket rule with late unbreakable cursor, complete with dark green leather slip case. Everything in very good condition, and un-marked. This series is the replacement for the earlier 4097 pocket series, which was a very fragile Xylonite design, these are quite rugged, and much nicer in appearance.
(6 Scales)
Front – DF, [ CF, CI, C, ] D, L
Back – Blank
Stock: 1
USD $75
5″/6″ Polyphase Duplex Pocket Set
This uncommon K+E pocket rule has an unbreakable improved cursor and white body with black engraved and filled scales. This rule has trig (with minutes/seconds, useful for navigation) and folded scales.
(13 Scales)
Front – DF, [ CF, CI, C, ] D, L
Back – K, A, [ B, ST, S, ] D, T
Stock: 1
USD $165
12.5″/10″ Full Size Slide Rule
complete with sewn leather case. This is the early log log rule from K+E, which still has trig functions in degrees, minutes and seconds (useful for map navigation).
The slide has serial number 604619, there is NO K+E logo, only the name. The rule is in very good condition, the case in good condition, but has numerous wear marks. A very nice set with old trig scales from long ago.
(17 Scales)
Front – K, DF, [ CF, CIF, CI, C, ] D, L
Back – LL0, A, [ B, S, T, C, ] LL3, LL2, LL1
Stock: 1
USD $135
Exceptionally useful late version Ivorite body rule from K+E (68-1565), with mint gold-embossed, black sewn leather case and manual. This modern style rule has the unique inch/cm converter scales and rulers on the rear side. A very attractive and useful rule, with dual Sq scales, trig and folded scales, plus the metric conversion/rulers/log calculator on the rear face.
(16 Scales, 2 Rulers)
Front – Sq1, Sq2, DF, [ CF, T, SRT, S, CI, C, ] D, A, K
Back – number, [ cm, (factors and data) inch, ] Logarithm
Stock: 5
USD $159
Exceptionally useful late version Ivorite body rule from K+E (68-1565), with mint gold-embossed, black sewn leather case. This very late (1966 scale copyright) modern style rule has the unique inch/cm converter scales and rulers on the rear side. A very attractive and useful rule, with dual Sq scales, trig and folded scales, plus the metric conversion/rulers/log calculator on the rear face.
(16 Scales, 2 Rulers)
Front – Sq1, Sq2, DF, [ CF, T, SRT, S, CI, C, ] D, A, K
Back – number, [ cm, (factors and data) inch, ] Logarithm
Stock: 1
USD $225
This is an extremely rare, early model K&E rule in it’s original box, complete with leather case, care instructions, and user manual. 20″ rule, with rulers on both the upper and lower edges.
(9 Scales, 2 rulers)
Front – A, B, CO, C, D, K, [S, L, T]
Back – Factors
Stock: 1
USD $195
6″/5″Pocket Slide Rule
Ivorite, Log Log Duplex Decitrig (also known later as the ‘Jet-Log’, or in this pocket size, the ‘Jet-Log Jr.’) rule, with metal framed unbreakable cursor. White “Ivorite” construction, with engraved black and red scales that include directional tilt for inverse scales. A real powerhouse duplex rule from K+E in a convenient pocket format.
This rule works the same as the earlier and justly famous full sized 4081-3 and 4181-3 rules, but in pocket size. A very nice find, and an outstanding pocket rule, certainly the most desirable and requested K+E pocket model.
(21 Scales)
Front – LL02, LL03, DF, [ CF, CIF, CI, C, ] D, LL3, LL2
Back – LL01, L, K, A, [ B, T, SRT, S, ] D, DI, LL1
Stock: 1
USD $95
This is an early version Ivorite body Jet Math Pocket rule from K+E, with green leather pocket sheath case, and softcover manual.
This K+E pocket rule has an unbreakable improved cursor and white body with black engraved and filled scales. A very attractive rule, and complete in a factory boxed set. This rule has folded (CF/DF) scales at pi, with the trig scales in decimal degrees. The back is blank, but the slide is reversible with trig scales (T, ST, S, C). The pic shows the actual box condition, and all the parts offered for sale.
(12 Scales)
Front – K, DF, CF, L, CI, C, D, A [ T, ST, S, C]
Back – Blank
Stock: 2
USD $95
Ivorite , full size rule, with two rulers (metric/imperial) on the upper and lower edges.
(12 Scales)
Front – K, DF, CF, L, CI, C, D, A [T, ST, S, C]
Back – Conversion factors
Stock: 1
USD $69
K+E Ivorite Pocket Rule
6″/5″ Pocket Slide Rule
A commerce oriented simplex pocket rule with late unbreakable cursor. This series is the replacement for the earlier 4097 pocket series, which was a very fragile Xylonite design, these are quite rugged, and much nicer in appearance.
(6 Scales)
Front – DF, [ CF, CI, C, ] D, L
Back – Blank
Stock: 1
USD $85
6″/5″Pocket Slide Rule
Ivorite, rule, with metal framed unbreakable cursor, engraved black scales that include directional tilt for inverse scales. Includes original K&E leather clip case for convenient carrying.
(13 Scales)
Front – DF, CF, CI, C, D, L
Back – K, A, B, ST, S, D, T
Stock: 1
USD $95
Inlaid wood, full size rule.
(14 Scales)
Front – K, A, B, T, ST, S, D, DI
Back – DF, CIF, CI, C, D, L
Stock: 1
USD $185
10″ Log Log Duplex Decitrig Slide Rule one of K+E’s premiere duplex rules, in the inlaid wood edge format.
(21 Scales)
Front – LL02, LL03, DF, [ CF, CIF, CI, C, ] D, LL3, LL2
Back – LL01, L, K, A [ B, T, SRT, S, ] D, DI, LL1
Stock: 1
USD $185
12.5″/10″ Full Size Slide Rule complete with original embossed green slip case. Cream white Ivorite construction with black engraved scales. This is essentially a late version of the 4053 made all of Ivorite like the 4150 series pocket rules, with folded scales, and decimal trig scales related to the C and D scales.
The rule has side rulers in both cm and inches, the back has conversion factors. The rule and cursor are in excellent condition, the case is in good condition, with some folding creases at the top flaps. A very interesting rule that marked the serious shift along with the 4181 to Ivorite body design for K+E.
(12 Scales, 2 rulers)
Front – (inch) K, DF, [ CF, L, CI, C, ] D, A (cm)
Back – factors [ T, ST, S, C, ]
Stock: 3
USD $235
12″/10″ Full Size Slide Rule
K+E’s famous Deci-lon duplex rule, in very good condition, with very good orange sewn leather case, and some accessory belt loops. This is K+E’s late production flagship rule, with unbreakable cursor, Ivorite body and adjustable frame, all free of marks, names or initials. Has 8 log log scales, a split square root scale, DI and folded scales.
An outstanding and powerful rule, cleverly designed. Here’s a chance to get a wonderful rule set that will give many years of service.
(26 Scales)
Front – Ln-3, Ln-2, Ln-1, Ln-0, A, [ B, T, SRT, S, C, ] D, DI, K
Back – Sq1, Sq2, DF, [ CF, CIF, L, CI, C, ] D, Ln0, Ln1, Ln2, Ln3
Stock: 1
USD $175
10″ Log Log Duplex Vector Slide Rule one of K+E’s more unusual duplex rules, with hyperbolic trig functions. Has Th and Sh1 and Sh2 scales.
Glass cursor and unusual side engraving of the model number data. This rule was used in the electrical industry and for other vector calculations. Pre-1947 scale copyright version, not very common.
(21 Scales)
Front – L, LL1, DF, [ CF, CIF, CI, C, ] D, LL3, LL2
Back – LL0, LL00, A [ B, T, ST, S, ] D, Th, Sh2, Sh1
Stock: 1
USD $275
K+E’s famous Deci-Lon duplex rule, in very good condition. These cases are slightly different, being stitched/formed leather, as opposed to a folded/stitched leather case. Does not include any supplementary sheets or documents. This is K+E’s late production flagship rule, with unbreakable cursor, Ivorite body and adjustable frame, all free of marks, names or initials. Has 8 log log scales, a split square root scale, DI and folded scales. An outstanding and powerful rule, cleverly designed.
Scales include:
Front – Ln-3, Ln-2, Ln-1, Ln-0, A, [ B, T, SRT, S, C, ] D, DI, K
Back – Sq1, Sq2, DF, [ CF, CIF, L, CI, C, ] D, Ln0, Ln1, Ln2, Ln3
Stock: 6
USD $275
K+E’s famous Deci-Lon duplex rule, in very good condition, with very good orange sewn leather case, and supplementary instruction/formula sheets. This is K+E’s late production flagship rule, with unbreakable cursor, Ivorite body and adjustable frame, all free of marks, names or initials. Has 8 log log scales, a split square root scale, DI and folded scales. An outstanding and powerful rule, cleverly designed.
Scales include:
Front – Ln-3, Ln-2, Ln-1, Ln-0, A, [ B, T, SRT, S, C, ] D, DI, K
Back – Sq1, Sq2, DF, [ CF, CIF, L, CI, C, ] D, Ln0, Ln1, Ln2, Ln3
Stock: 1
USD $49
This combination slide rule/ruler comes with the original box and case. The box and case are not in great condition, but the rule has held up well.
Scales are as follows:
Front – A, C, D, K, CF, DF, CI, S, B, L, T
Back – 6″ / 13cm ruler
Stock: 1
USD $49
A single-sided rule for the beginner pocket rule user.
Scales are as follows:
Front – C, D, L, CF, DF, CI
Back – Blank
Stock: 1
USD $45
This 6″ K&E simplex rule features 9 scales, and both imperial and metric rulers on the reverse side.
Scales are as follows:
Front – A, B, C, D, K, CI, S, L, T
Back – Imperial/metric rulers
Stock: 1
Sphere Research Corporation