Vintage 1960 Concise Conversion Tables & Circular Slide Rule Japan Sam & Etani

Description

Vintage 1960 Concise Chemical Tables & Circular Slide Rule
Includes circular slide rule with tables insert, manual, and red sleeve
Model CTCS-552
Sam & Etani, INC.
Made in Japan
Sleeve is branded with Copolymer Rubber & Chemical Corporation
Condition:
The slide rule and manual are in great condition for their age.  There is some yellowing of the pages of the manual.
The sleeve has some dark smudges/stains (see pictures)