A used valve with some evidence of age and minor physical marks.
It has been tested it on an AVO Mk3 Valve Characteristic Meter and tests good (slightly under specification, but still a working valve).
Data Book Specification (Ideal Readings)
ia (mA) - 83
GM (mA/V) - 6.5
Actual Readings
ia (mA) - 80
GM (mA/V) - 5
