The 1968 Concise Circular Slide Rule 600ST is a vintage engineering tool originating from Japan. Featuring science tables by Sama & Etani, this slide rule is a valuable collectible item for those interested in the history and practicality of slide rules in engineering calculations. With its compact design and precision capabilities, this concise circular slide rule is a rare find that showcases the craftsmanship of Japanese engineering in the mid-20th century.

Condition: Fair with cracks on top and bottom but does not affect the usage!