Hemmi 256 'Electrical Communications' Slide Rule. Bamboo. 20 Scales. Excellent.

Description

Hemmi 256 "Electrical Communications" Slide Rule.
Celluloid on bamboo.
Duplex.
20 scales x 25 cm, including db, Neper, L', C', SI, TI, Lambda, F.
Plus 11 groups of constants and equivalents below 3 scales.
The 256 was made from 1950 to 1968.
No date code on rule.
Rule is in excellent condition. No blemishes.
Metal parts are clean and bright.
Slide and cursor move smoothly and easily.
Hemmi hard cardboard slip cap case is sturdy with tape.
Payment is due within 3 days after end of auction.
Buyer pays .70 shipping to USA address via First Class Mail Package.
Shipping to Europe or Australia is .50.  Canada is .25.
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