F.251 Data Sheet MJS-p-0438

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K&E, Celanese Celcon, 1961-1964

Serial Number or Date Stamp: 4415

Country: USA

Primary construction material: pl

Case included?: yes

General Description: Basic linear polyphase duplex slide rule

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

Front Scales: DF [ CF CI C ] D L

Back Scales: K A [ B ST S ] D T

Notes: Doric 9068-type (68-1555) Celanese Celcon; rare

References: https://www.allaboutastro.com/all-about-ke-rules.html

Date Acquired: 07/16/2026