Vintage Engineering Instruments 10” Slide Ruler Model 250 -V

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

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

Vintage 1966 RAYTHEON DB Slide Ruler With Case 5860

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

Vintage AcuMath 400B Slide Rule 10” With Box Case & Papers.

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