Triangle and Flat 12"/6" Scale Rules 11 For Sale and 6" Slide Rule
Would like to sell as a package of 12

$70 Firm
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12" Triangle Mechanical Engineers & Architects: 1:20, 1:25, 1:50, 1:75, 1:100 1:125 two for sale

12" Triangle Surveyors: 1:500, 1:1000, 1:1250, 1:1500, 1:2000, 1:2500 one for sale

12" Triangle Engineers: 10, 20, 30, 40, 50, 60 one for sale

12" Triangle Metric 1: 20/40/50/100/ 3 1/2 one for sale

12" Flat scale metric readings for feet and inches drawings one for sale

12" Flat scale 1:5/1:50 1:10/1:100 1:20/1:200/
1:500/1:1000 one for sale

12" Flat Architects: 1/8", 1/4", 3/8", 1/2", 3/4", 1", 1-1/2", 3" One for sale

6" Flat scale 1:5/1:50 1:10/1:100 1:20/1:200/ 1:500/1:1000 three for sale

Helix Top Precision No A50S 6" slide rule