F.23 Data Sheet MJS-p-0323

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Boots Ringplan, Precision Log Log, c.1970

Serial Number or Date Stamp:

Country: UK

Primary construction material: pl

Case included?: no

General Description: Advanced linear log-log slide rule

Length of 1 decade = 5 in, and overall scale length = 5 in. The largest physical dimension is 5 in.

Front Scales: in /| LL3 LL2 A [ B CI C ] D K LL1

Back Scales: [ T2 T1 L S ]

Notes: Nice pocket log-log; instruction book; made in Japan for Boots Ringplan Pharmacy

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

Date Acquired: 10/11/2023