F.107 Data Sheet MJS-p-0246

Hemmi, 153, 1936-1940

Serial Number or Date Stamp:

Country: JPN Primary construction material: wd Case included?: yes

General Description: Advanced linear log-log vector/hyperbolic duplex slide rule

Length of 1 decade = 10 in, and overall scale length = 10 in. The largest physical dimension is 10 in.

Front Scales: L K A [ B CI C ] D T Gtheta

Back Scales: theta Rtheta P [ Q Q’ C ] LL3 LL2 LL1

Notes: Post 1461 Electronic Engineering rule; elliptical Post logo (only Post with that logo); serif font; 1923 patent; owner Louis E. Herrington, Colorado

References: https://www.sliderulemuseum.com/Post.htm, https://www.sphere.bc.ca/test/post.html

Date Acquired: 02/17/2022