Vintage FIRELLI Geotec Slide Rule No. 341 3405 by Hughes-Owens Made in Japan
Vintage FIRELLI Geotec Slide Rule No. 341 3405 by Hughes-Owens Made in Japan. It comes in a leather case and in new condition. The slide rule is still sealed in the plastic package.
Collectible item from the field of engineering and science, dating back to the middle of 20th century.