Vintage Blundell Harling S143-10 Slide Rule 10" Rietz Scales with Case New Rare

Vintage BRL P16D pocket small slide rule in brown leather case made in England

Vintage Slide Rule PIC Thornton F157 Engineering Tool Maths Pat no 754938 Cased

Blundell Harling 10" Slide Rule England w/ Case + W H Smith Instruction Book

Vintage mcl simplon slide rule

Vintage 1960s Ricoh Slide Rule #105 In Original Case Made In Japan In Box

Engineering Instruments INC Indiana 10 Inch Slide Rule in Box Made in USA

Vintage German 1960s ARISTO 0971 Hyperbolog Engineers Slide Rule Case Manual Box