(1) Tested Very Strong Rare Speed 227 (type 27) Globe Tube with a Green Marbled Base.
Dark olive green marbled bakelite base.
The original label is still present and with very little wear.
Screen mesh wrap with a cup getter.
Bare bullseye bottom which indicates that this is an early version instead of the typical licensing statement seen on later tubes.
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 = 1225 micromhos
Minimum pass/good = 630
NOS Target Value = 960
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