Hanging filament with a very rare top side getter with a pac man cutout mica to allow for the room. Normally 5R4GY tubes are seen with either a double DD getter or a singular bottom getter, it is rare to find them with a top side getter as with this example.
The box shows staining on a couple of panels - see photos.
Tested on a calibrated Hickok TV-10 military tube tester with no shorts at 1475-1400 where 800-800 is minimum pass/good.
