USD $35
A compact 90mm/3 inch pocket circular slide rule with metric conversion factors and temperature conversion on the reverse side. Cursor has scale names imprinted, as well as the rule body. Excellent quality compact rule, complete with vinyl slip case and factory manual.
BRAND NEW, complete with WHITE vinyl case and manual. These fit perfectly in a shirt pocket!
(8 Scales, Metric + Temperature Data)
Front – L, D, C, CI, A, K, S, T, K
Back – Metric + Temperature Data
Stock: 10
USD $35
A compact 2 1/2 inch pocket circular slide rule, attached to a rectangular data center card with pull-out insert. The rear side has a metric data conversion table, the center has a pull out unit conversion data chart with prefix terms. Ideal for those working with metric and imperial units. Very nice rule, complete with vinyl slip case and manual.
BRAND NEW, complete with vinyl case and manual.(8 Scales, Side Rulers, Metric Data + Factor Conversion Data Card)
Front – D, C, CI, L, A, S, T, K
Back – Metric Data
Inside – Data Card, Factor Conversion Data
Stock: 17
USD $79
The 600CE is a compact 2 1/2 inch pocket circular slide rule, attached to a rectangular data center card (with side inch/cm rulers) complete with pull-out chemical data insert. The rear side has a Detailed Periodic Table of the Elements (to 103), the center has a pull out data chart with the full CE double sided data chart. These rules were re-branded by various companies for promotional use, and come with original vinyl slip case and manual.
THIS IS THE MOST REQUESTED Data Center from Sama and Etani. Sama and Etani had to stop production of these rules many years ago because teachers complained students used them to cheat on exams, and so a fantastic reference tool was lost forever. This is a VERY hard rule for us to source, so please don’t miss your chance to get one!
(8 Scales, 2 side rulers, Periodic Table + Data Card)
Front – D, C, CI, L, A, S, T, K
Back – Periodic Table
Inside – Data Card, Chemical Engineering
Stock: 7
USD $79
A compact 2 1/2 inch pocket circular slide rule, attached to a rectangular data center card with pull-out insert. The rear side has a metric data conversion table, the center has a pull out data chart physical data, constants, formulas and terms. This rule is ideal for chemists, lab techs, and enthusiasts of quality pocket rules. These rules were branded by various companies for promotional purposes, and come in an assortment of case colors (red, black, white).
BRAND NEW, complete with vinyl case and manual.
(6 Scales, Side Rulers, Chemical/Element data)
Front – D, C, CI, L, A, K
Back – Table of Elements
Inside – Data Card (gas constants, velocities, flow rates, etc)
Stock: 4
USD $35
A compact 2 1/2 inch pocket circular slide rule, attached to a rectangular data center card with pull-out insert. The rear side has a metric data conversion table, the center has a pull out data chart physical data, constants, formulas and terms. Ideal for those in any general science area working with metric units. Very nice rule, complete with red vinyl slip case and manual.
BRAND NEW, complete with vinyl case and manual.
(8 Scales, Side Rulers, Metric Data + Physical Data Card)
Front – D, C, CI, L, A, S, T, K
Back – Metric Data
Inside – Data Card, Physical Data
Stock: 16
USD $44
Very similar to the Type E rule by Concise, this circular rule features most of the same features in the original Japanese. 5 scales, with weights and measure conversion tables on the slide out data card.
Includes original vinyl slipcase, and instruction booklet.
(5 Scales, Conversion data card)
Front – D, C, CI, A, K
Back – Conversion reference table guide
Stock: 1
USD $45
A compact 2 1/2 inch pocket circular slide rule, attached to a rectangular data center card with pull-out insert. The rear side has a color coded reactance chart, the center has a pull out data chart with color codes, wire data, constants, formulas and terms. An outstanding and useful device, incredibly handy if you are in the electronics industry. These fit perfectly in a shirt pocket. Complete with vinyl slip case and manual.
(8 Scales, Side Rulers, Reactance Chart + Data Card)
Front – D, C, CI, L, A, S, T, K
Back – Reactance Chart Inside – Data Card, Electronics
Stock: 7
USD $35
This circular rule is for the person doing conversions on the go, and features a pared back set of scales to make room for a robust set of conversion factors using the slide out data card for any unitary conversion a tradesman might need. A fine addition to any shirt pocket, daytimer, or field notebook.
Includes original vinyl slipcase, and instruction booklet.
(5 Scales, Conversion data card)
Front – D, C, CI, A, K
Back – Conversion reference table guide
Stock: 1
USD $39
A more advanced, but still very clean looking and easy to read circular slide rule. Includes original vinyl slip case and instruction manual.
(12 scales)
Front – L, D, C, CI, A, K
Back – DI, D, S, T1, T2, ST
Stock: 2
USD $33
The Hope 740 is another custom rule made by Concise and marketed under another label, in this case Hope, who offered both circular and straight rules from Japan. The 740 is a metric converter built on the Concise data center ‘chassis’. The front is a compact 3 inch pocket circular slide rule, attached to a rectangular data center card (with side inch/cm rulers on the back). The rear side has a C/F temperature scale, inch and centimeter rulers and a nice table of constants. A very handy rule for quick conversions of temperature, length, volume, weight and area, PLUS an extra C/D scale set for general calculations. Complete with black/clear vinyl slip case, and short factory manual, all in MINT CONDITION!
This ia a very nice looking item from Concise that will be very handy in your shirt pocket!
(4 Scales, 2 back rulers, Constants)
Front – VOL/WEIGHT/AREA/LENGTH C, D
Back – Rulers, Constants
Stock: 2
USD $35
A classic and easy to read circular rule, great for beginners or those looking for their first circular rule.
(5 scales, conversion factors)
Front – D, C, CI, A, K
Back – Metric / imperial conversions
Stock: 1
USD $35
A compact 2 1/2 inch pocket circular slide rule, attached to a rectangular data center card with pull-out insert. The rear side has a metric data conversion table, the center has a pull out data chart with color codes, wire data, constants, formulas and terms. Ideal for those in the electronics industry working with metric units. Very nice rule, complete with vinyl slip case and manual.
Complete with vinyl case and manual.(8 Scales, Side Rulers, Metric Data + Electronics Data Card)
(8 scales, 2 rulers, data card, and metric conversions)
Front – D, C, CI, L, A, S, T, K
Back – Metric Data
Inside – Data Card, Electronics
Stock: 1
USD $45
Concise Permanent Calendar & World Time Pocket Circular Slide Rule w/Case & Manual (Japanese)
Stock: 1
USD $55
Pocket circular slide rule for for converting between world time zones, includes the original case, in Japanese.
Stock: 1
Sphere Research Corporation