Brown's Permanent Way Slide Rule

Slide Rule, "Brown's Permanent Way Slide Rule, Pre Pat. 6073-1949". 11 1/2"x2"

Details

Category:
Tools of the Trade & Personal Accessories
Object Number:
1987-8465
type:
slide rule
taxonomy:
  • furnishing and equipment
  • tools & equipment
  • calculator
credit:
Ebling