Unused tubes, new in original box. Containing dust from the tens of years.

Black plates, hanging filaments and bottom square getter. Date code: 1945 both.

Replacement for 5U4G (adoptor necessary).

Tested at Neuberger 370 (49/49 mA, new tubes are usually  45 - 50 mA)

Privater Verkauf ohne Rücknahme und Gewährleistung