A NOS Osram Valve M.T.7B in its old original wooden crate!!

31" x 14" x 13 1/2". Net Weight 20.0 lbs/19.1kg.

From a quick google search it says is manufactured in 1922?

And also it is a transmitting triode air cooled power output valve made in UK.

Beautiful tube with good filaments.

I fired it up briefly and it shows the tube lighted up beautifully.

So there you have it. Other than that this tube is untested and I have no way to know its
operating condition.

Thank You and Good Luck : ) : )