Richardson, Direct Reading Pocket, c.1912
Serial Number or Date Stamp:
|Country: USA||Primary construction material: ss||Case included?: no|
General Description: Basic linear Mannheim slide rule
Length of 1 decade = 5 in, and overall scale length = 5 in. The largest physical dimension is 5 in.
Front Scales: A [ B C ] D
Notes: pocket rule; slight warping on end of slide; no cursor
Date Acquired: 01/16/2021