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(1) Tested 1956 Tung Sol 5U4GB Tube Smooth Black Plates Dual Getters Code 619-3

(1) Tested 1956 Tung Sol 5U4GB Tube Smooth Black Plates Dual Getters Code 619-3

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$24.95 USD
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(1) Tested Tung Sol 5U4GB Tube.
Date Code 619-3 (19th week of 1956).

Smooth black plates and dual square D top side getters.

The wording on the base is faded but still legible. 
There is some scratching on the base from a prior installation.

Tested on a calibrated Hickok TV-10 military tube tester with no shorts at 1300-1400 where 800-800 is minimum pass/good.

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