This trio of Wizard type 76 triodes was tested on our Paul Hart-calibrated TV7/U for shorts, gas and transconductance. There were no shorts or gas.
Transconductance measured 40, 48 and 55 where minimum (65%) is 36 and 100% is 55.
These tubes have black, rounded plates; rectangular mica spacers (with rounded edges on top); wire snubbers (for low microphonics) and excellent flashing.