Lot of 2 Vintage Slide Rules w/ Leather Carrying Cases

Sun Hemmi No. 256 Duplex slide rule with cardboard carrying case

R.C. Pickett Model No. 902 Simplex-Trig Slide Ruler with Leather Carrying Case

VINTAGE Mannheim Accu-Math SLIDE RULE Model 400 w/ Carrying Case MINT CONDITION

PICKETT Slide Rule N1010 M23 CARRYING CASE US Army Leather Rule Vintage

Megger Biddle Instruments Vintage Black Carrying Case w Strap - Case Only

vintage M23 Carrying Case with Slide Ruler complete

WWII MILITARY Howitzer and M31 artillery trainers Slide Rule And Carrying Case