vintage 4 small ruler Frederick Post Co. No. 1441 SUN Hemmi Japan

Vintage Sun Hemmi Frederick Post 1441 Slide Rule Occupied Japan

No. 1441 SUN Hemmi Japan.

vintage 4 small ruler Frederick Post Co. No. 1441 SUN Hemmi Japan

VINTAGE SUN HEMMI Slide Rule No. 34RK w/ Case Tokyo Japan

Calculating the Quality of Vintage Slide Rules

Vintage Sun Hemmi Bamboo Slide Rule POST NO. 1441 Includes Box

Vintage Sun Hemmi Frederick Post 1441 Slide Rule Occupied Japan

Japan Slide Rule

VINTAGE FREDERICK POST Co. 1444K Pocket Slide Rule with Top Grain

Vintage Sun Hemmi Bamboo Slide Rule POST NO. 1441 Includes Box