Acu-Math No. 400 12" slide rule in Leather Case Made in USA

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

Acu-Math ACUMATH No. 400 Plastic SLIDE RULE In Case 12-1/4” Length MADE IN USA

12" Slide Rule Acu-Math No. 400 Made in USA One-sided w Case

Acu-Math ACUMATH No. 400 Plastic SLIDE RULE In Case 12-1/4” Length MADE IN USA

Vintage Acu Math No 400 Slide Rule With Case USA Made Plastic Engineering Tool

vintage Acu-math no. 400 slide rule with plastic case, good condition made in US

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