USD $110
While the box is a little worn, the rule itself is in mint/new condition and is still in its factory sealed plastic. Includes original instruction manual and case.
Front – T, K, P, S, C, D, +3 other scales, L, LL1, LL2, LL3
Back – Blank
Stock: 1
USD $65
This Hemmi pocket rule is in new/mint condition, and is still in its factory plastic sealed bag.
Scales include:
Front – C, D, + 7 other scales
Back – Instructions and unit conversion data
Stock: 1
USD $35
This antique wooden rule features an imperial ruler along the top edge, and basic scales on the front. Based on its age, scales, and reference tables, this looks like an early architect’s rule for construction projects.
Scales include:
Front – A, B, CI, C, D, K
Back – Reference chart for various building materials
Stock: 1
USD $179
It is rare to find these rules, much less find them in working condition. This rule features 10 scales, an imperial ruler on the upper edge, and mechanical adding machine on the back. Comes with original case and stylus.
Scales include:
Front – L, K, A, B, CI, C, D, S, ST, T
Back – Addiator, unit conversion, and common formulae
Stock: 1
USD $50
Made under the joint marques fo KOH-I-NOOR and Graphoplex is this X2. Features a metric ruler along the top edge and original leather case in good condition.
Scales include:
Front – a, b, b^2, B, B^2, B^3, L, LL1, LL2, LL3, cos, S, T, S&T
Back – Blank
Stock: 1
USD $40
Still in good condition, this rule has no scale bleeding and moves smoothly. Features imperial and metric rulers on the upperand lower edges of the rule, back features standard unit conversions.
Scales include:
Front – A, B, C, D, K, CI, S, L, T
Back – Unit conversion chart
Stock: 1
USD $35
Made in Japan, this bamboo duplex pocket rule has 13 scales.
Scales include:
Front – C, D, L, CF, DF, CI
Back – A, B, C, D, K, S, T
Stock: 1
USD $145
This Staedtler rule features metal cursor end caps, and metal braces with supporting ridges to allow for desktop use of the rule. Includes a new leather case engraved with the Sphere Research Logo.
Scales include:
Front – A, B, C, D, L, K, LL1, LL2, LL3, LL01, LL02, LL03
Back – C, D, P, S, T, CF, CI, DF, CS, CT, ST, CIF
Stock: 1
USD $45
A basic plastic body simple pocket rule with rulers on the upper and lower edges of the rule. Comes in original factory case and box.
Scales include:
Front – A, B, C, D,K, CI
Back – Blank
Stock: 1
USD $15
This is a very basic rule made from a wood body and laminated plastic for the scales. It looks like it was used for instructional or educational purposes, and was produced in bulk. The scales are starting to delaminate, making some of the numbers harder to read. Definitely an unusual piece of history.
Scales include:
Front – A, B, C, D,K, CI
Back – Blank
Stock: 1
USD $129
Featuring the Nestler green central slide, this rule has no scale bleeding and is in excellent condition. Features an imperial ruler along the upper edge fo the rule.
Scales include:
Front – X, X2, X3, 1/x, SIN, COS, LL1, LL2, LL3
Back – Blank
Stock: 1
USD $30
This single sided rule is suitable for the mathematician on the go and features clear plastic edging on the upper and lower ruler edges with imperial and metric rulers.
Scales include:
Front – X, XZ, X2, X3, X 2/Z, 1/X, SIN, TG, ROOT (1-X2), LGX, E^X, E^0.1X, E^0.01X
Back – Blank
Stock: 1
USD $195
This bamboo rule is still in its original factory sealed plastic, however, the rule does show signs of discoloration and marking from having been stored for so long. The case is also fairly worn and has lost its finish in multiple areas. Ruler in inches along the upper edge of the rule.
Scales include the following:
Front – A, C, D, K, CF, DF, CI, L, TI1, TI2, SI1
Back – Blank
Stock: 1
USD $125
Still in its original plastic sleeve and unopened, is this Hemmi 60 pocket rule. Features metric and imperial rulers on the upper/lower edges of the rule.
10 scales.
Stock: 1
USD $95
This early Hemmi pocket rule features a magnifying cursor, and an imperial unit ruler along the top edge of the rule.
Scales include:
Front – A, B, C, D, CI, S, L, T
Back – Blank
Stock: 1
USD $129
This advanced Hemmi pocket rule features a metric ruler along the upper edge, and 13 scales (5 regular sacles unmarked).
Scales include:
Front – P, S, T, K, L, LL1, LL2, LL3 (+5 unmarked scales)
Back – Blank
Stock: 1
USD $35
This seven scale pocket rule features an unusual cursor design, with a bulkier metal frame on only three sides of the cursor. Imperial/metric ruler on the upper and lower edges of the rule. As is true of most Hemmi rules, this is a bamboo rule.
Scales include:
Front – A, B, C, D, S, L, T
Back – Blank
Stock: 1
USD $85
This bamboo, eight scale, pocket rule features a metric ruler on the upper edge of the rule. Includes original box, manual, and case.
Scales include:
Front – A, B, C, CI, D, S, L, T
Back – Blank
Stock: 1
USD $75
This rare Faber Castell wood rule features 7 scales on the rule proper, and metric/imperial rulers on the upper and lower edges fo the rule.
Scales are as follows:
Front – 7 Scales
Back – Reference and conversion references (in German)
Stock: 1
USD $59
This rare Faber Castell wood rule features 8 scales on the rule proper, a metric ruler on the upper edge of the rule, and another logarithmic reference on the lower edge of the rule where you would normally find an imperial ruler. There is some separation beginning between the plastic and wood body on the top left of the rule.
Scales are as follows:
Front – 7 Scales
Back – Reference and conversion references (in German)
Stock: 1
USD $165
This rare 13-scale pocket rule features a metric ruler along the top edge, and an imperial ruler on the reverse side of the rule. This is an all plastic rule, and comes with the original instruction sheet in German.
Scales are as follows:
Front – Metric ruler, L, K, A, B, CI, C, D, F, S, T, LL1, LL2, LL3
Back – Imperial ruler
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 
