Vintage Russian USSR Logarithmic Wood Slide Ruler 1974 With Case ICU2-50

Vintage Engineering Instruments 10” Slide Ruler Model 250 -V

ACU-MATH no 1211 vintage pocket slide ruler with sleeve Made in USA

Vintage Mannheim Professional Slide Ruler ACU-MATH No 400 w/ Case USA

2 Vintage ACU Math Slide Rule No 584 & N0. 400 w/case. Log Decimal Trig Rulers

Pickett Microline 120 Slide Rule Engineering Math Calculator Tool Ruler w/ Case1

ACU-MATH 10" Student Slide Rule 400B AND The C - THRU Ruler Co. Lot

Vintage Pickett N902-T Simplex Trig Slide Ruler w/ Leather Case