Hepworth's Permanent Way slide rule

Made:
Birmingham
maker:
I and D Smallwood Limited

Slide rule, "Hepworth's Permanent Way Rule". Steel rule made by "I & D. Smallwood, Birmingham". In yellow card box with original instructions. 12 3/4"x1 3/4"; 325x45mm

Details

Category:
Tools of the Trade & Personal Accessories
Object Number:
1988-7479
type:
slide rule
taxonomy:
  • furnishing and equipment
  • tools & equipment
  • calculator
credit:
Barbey, M.F.