Tested on the AVO mk3 tester by qualified electrical engineers. 

Factory spec. Ia = 65mA, gm = 6.3mA/V. Measured: Ia = 63mA, gm = 6.3mA/V

Base is slightly loose to the valve so this item is priced accordingly. 

See my other listings for a similar valve.

Sold as seen in vintage cosmetic condition, no returns.