F.388 Data Sheet MJS-p-0446

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Richardson, 1776 Pantocrat, 1917

Serial Number or Date Stamp:

Country: USA

Primary construction material: ss

Case included?: yes

General Description: Basic linear merchant polyphase slide rule

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

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

Back Scales:

Notes: Two extra Pantocrat slides – 1860 = [ Days CI Rate ] and 1860 LL = [ C LL1 LL2 LL3 ]; a thank you goes out to MikeF

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

Date Acquired: 09/21/2026