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
- Object Number:
- 1988-7479
- Materials:
- steel (metal)
- Measurements:
-
overall: 12 3/4 in x 1 3/4 in
- type:
- slide rule
- credit:
- Barbey, M.F.
