Mullard Magic: For All Your Vintage Valve and Radio Needs!
5751, GE, TRIPLE MICA, HALO GETTER, GREY PLATE, MARCH 1963 OWENSBORO PRODUCTION
12AX7, Brimar, 15mm electrode cage, Manufactured September 1967, ECC83
12AX7, Brimar, Manufactured June 1968, ECC83
12AX7, STC Brimar, Manufactured November 1969, ECC83
12AX7A, Toshiba, 14mm Long Plate , 1J Date Code, ECC83