F.309 Data Sheet MJS-p-0046

Richardson, Direct Reading (812), c.1912

Serial Number or Date Stamp:

Country: USA Primary construction material: Al Case included?: yes

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: Nice condition; early rule

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

Date Acquired: 11/26/2018