Western Electric 205-E vacuum tube.  Tests good on well-calibrated TV-7/D, reading 50 on scale B (good = 37).  Splotches of tungsten or getter showing on the equator of the tube in line with the filament plane..

Tube has been minimally cleaned using water and gentle dabbing with paper towels.  Further cleaning left to buyer.  Plastic label will remove cleanly!

Test setup shown in photos.  Lacking the correct adapter, I used clip leads to connect pins to tester, but maintained tube in correct orientation with filament plane vertical, per WE specs.