Rare vintage Stanley Stay Rule (circular slide rule - GPO / War Department)

Slide rule Vintage technology Historic calculator Sun Hemi Japan Half boxed

Vintage Sun Hemmi Bamboo Slide Rule No 130 System Darmstadt Original Box

Vintage Sun Hemmi Bamboo Engineering Slide Rule System mid section removes

Unique: Vintage Slide Rule In Original Box Made In England

Faber Castell 57/87 Students Advanced Rietz Model Slide Rule Made In Austria

Vintage Sun Hemmi Slide Rule - NO.P280

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