Two, Western Electric VT-52 tubes, with the shouldered glass envelope. The VT-52 is sometimes referred to as a "special 45", but more accurately is more closely related to the 50, UX-250, CX-350 family of 7.5 V filament, output triodes. Excellent silvering, firm bases. Tested on a Hickok TV-3 military tester that has been calibrated.  Tubes are matched for dynamic gain and structure- testing at testing at 2350, 2300 where pass/fail is 1170 micromho. Tubes are tested using bias setting as for the #45 and #50 type (the bias setting is the same for these types) and a filament voltage of 7.5 V, which makes the test setting equivalent to the #50 type.  There is no setting on my Hickock tester exclusively for the VT-52 type.

Many other lots of tubes for sale this week.