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: 3
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 $30
This is a supplementary manual meant to accompany the N4081 Log Log Duplex Decitrig Slide Rule, and explains the application of the plan and hyperbolic scales to vector calculations for the Log Log Duplex Vector N4083 slide rule from K&E.
Fiendishly well sealed in a protective plastic sleeve, it is in good condition, was published during a year in the 20th century, and is constituted of a certain quantity of pages.
Stock: 1
USD $40
A complete listing of K&E’s product lineup for the 1939 production year, which was certainly quite a year globally. Includes a product price list affixed to the inside rear cover.
581 pages, leather hardbound, catalog in good condition, attached product list has fraying/damage to some of the pages.
Stock: 1
USD $35
A rare snapshot of history, this catalog of Drafting, Reproduction and Surveying Equipment and Materials, Slide Rules, and Measuring Tapes, is from 1954. Includes detailed sketches of older equipment, some in partial color.
475 pages, hardbound with minor wear to books edges. Pages in excellent condition.
Stock: 1
USD $25
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