Vintage Acu-Math No. 400 Slide Rule w/ Case & Instruction Manual

VINTAGE ACUMATH NO. 400 SLIDE RULE WITH CASE NICE CONDITION MADE IN USA

Vintage Slide Rule Mannheim Acu-Math No. 400 w Original Sheath Acumath Calc Trig

Acu math no 400 math calculator slide ruler stick w/ case

Vintage Sun Hemmi Japan Slide Rule No.74 Bamboo Ruler Leather Sleeve Case

Vintage Mannheim ACU-MATH No. 400 Slide Ruler w/Original Sleeve. GUC PICS

Vintage ~ Mannheim Type Slide Rule ~ Acu-Math No. 400 w/Case & Manual

vintage Acu-math no. 400 slide rule w/ case, good condition made in U.S.A.