Beautiful pair of Mullard ECC31 valves. Black plates, pan getter. Equivalent to 6N7 family. These have matching factory codes: 1029.1 1MZA. 2.6ma/V @ 5.4mA & 2.7mA/V @ 5.2mA.
Pair ECC31 Mullard - Matching Factory Codes 1MP - 6N7 CV1285
Matched Pair Vintage Mullard EC31 Pan Getter Valves Tubes Used Tested (V33) #1
Matched Pair Vintage Mullard EC31 Pan Getter Valves Tubes Used Tested (V33) #2
M8100 6AK5 CV4102 MULLARD SPECIAL GOLD PIN MATCHED PAIR VALVE/TUBE
M8100 CV4010 5654 EF95 MULLARD VINTAGE PAIR VALVE TUBE - SQUARE GETTER BLACK ...
EF95 6AK5 M8100 MULLARD MATCHED PAIR BLACK PLATE RING GETTER NOS VALVE TUBE (...
