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Double sided metal weight calculator used in the 40s-50's,
this is from a Aeronautical Engineer and the slide still woks good.

Measures different types of metal, brass, al, mg, steel on one side
the other side measures wire, tubing, circles.
Instructions: Pull slide to set thickness of piece under width,
or set bar or rod size over shape.
8 3/4" Long
3" wide

Vintage Calculator Engineers Tool Graphic Calculator Old School


Overview

  • Vintage item from the 1950s
  • Materials: card board, metal, tools, measure, add, subtract, mathematics, paper ephemera, inches
  • Ships from United States to select countries.
  • Feedback: 194 reviews
  • Favorited by: 1 person