Mullard Magic: For All Your Vintage Valve and Radio Needs!
6V6GT, SYLVANIA, ,VT-107A, 10CV/511, GREY GLASS, 1950S GREY ENVELOPE
6V6GT, BRIMAR, MATCHED PAIR ,VT-107A, 10CV/511, BLACK GLASS, SAME FACTORY CODE, OCTOBER 1959 FOOTSCRAY PRODUCTION
6V6GT, SYLVANIA, MATCHED PAIR ,VT-107A, 10CV/511, GREY GLASS, BRITISH AIR MINISTRY 10CV/511 WITH 1950S GREY ENVELOPE SLEEVE