F.392 Data Sheet MJS-p-0445

Richardson, Direct Reading, 1913

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 = 10 in, and overall scale length = 10 in. The largest physical dimension is 10 in.

Front Scales: S A [ B C ] D T L

Back Scales:

Notes: 1913 rule, with celluloid on curved slide; 1913 cursor; 1911,12 patents; blackened Monel Metal to ease the eye; a thank you goes out to MikeF

References: https://www.sliderulemuseum.com/Richardson.htm

Date Acquired: 09/21/2026