[Milsurplus] Russian tube ( addendum)

[Ray Fantini]

Did not notice it but the tube in the picture dose not show the number,
the number on the tube is a two (2) with a thing that looks like a
upside down "w" on top of a "w" then the number twenty seven(27). the
tube is a 2.5 volt pentode with a plate voltage of 90 volts DC, would
speculate its a sharp cutoff but not 100%, inclined to think the tube
don't use the entire can but can be wrong.
Ray Fantini KA3EKH