Home / Store / School and Office / Vintage Acu-Math No.400 Slide Rule Vintage Acu-Math No.400 Slide Rule$12.50 In stock Vintage Acu-Math No.400 Slide Rule quantity Add to cart Category: School and Office Tags: math, rule, ruler, School Description Additional information Description Vintage Acu-Math No.400 Slide Rule. Good condition, comes with case. Additional information Weight .2 lbs Dimensions 12.75 × 2.5 × .4 in Related products Vintage Geotec Made in Japan Slide Rule with Leather Case $25.00 Add to cart Vintage 1950s Swingline Cub Stapler $9.50 Add to cart Vintage Boston KS Pencil Sharpener – Counter Mounted. $18.00 Add to cart Vintage Lufkin W616 6Ft Pocket Tape Measure $10.00 Add to cart