The T10 is a battery triode designed for the HF stage(s) in a radio receiver.
The pibs are of simple split-pin construction. The collar hold the pin firm in the composition base.
The balloon envelope is 45 mm in diameter, and excluding the B4 base pins is 88 mm tall.
References: Datasheet & 1043.
Absolute Maximum Operating Conditions¶
Updated February 14, 2013. shape:balloon construction:pinch type:triode age:1920.1930 base:b4 heater:2.0v pins:4 pin:1.a pin:2.g1 pin:3.f pin:4.f