(1) Tested Delco Type 27 Tube.

Date Code A8. 

The tube number is faded on the glass but still legible.

This tube tests above NOS specs.

Tested on a calibrated Hickok TV-10 military tube tester and exhibiting no shorts or leaks with the following results:

Test Result = 1050 micromhos

Minimum pass/good = 630

NOS Target Value = 945

~ Please view all 4 photos ~

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