F.181 Data Sheet MJS-p-0450

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K&E, 4053-3, 1911-1913

Serial Number or Date Stamp:

Country: USA

Primary construction material: wd

Case included?: no

General Description: Basic linear polyphase slide rule

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

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

Back Scales: [ S L T ]

Notes: Polyphase; metal cursor, extending to K scale; prod. marks 644 on end of rule

References: http://www.sliderule.ca/4053.htm; http://www.mccoys-kecatalogs.com/v24.2_p56-61.pdf; https://sliderulemuseum.com/SR_Dates.shtml

Date Acquired: 11/10/2026