(!!!!!) (Best Overall Pair) E80CF=7643 Valvo branded Amperex Germany PQ NOS 1966 1-2% matched (6BL8 SUB)
(!!!!) (Best Pair) E80CF=7643 Valvo branded Amperex Germany PQ NOS 1966 2-3% matched (6BL8 SUB)
(!!!) (Best Overall Pair) E80CF=7643 Valvo branded Amperex Germany PQ NOS 1966 1-2% matched (6BL8 SUB)
(!) E80CF Valvo Germany rebranded Philips Miniwatt SQ "PINCHED WAIST" NOS 1961 (6BL8 substitute)
(!) E80CF Valvo Germany rebranded Philips Miniwatt SQ "PINCHED WAIST" NOS 1962 (6BL8 substitute)
7643 Valvo branded Amperex PQ Germany "PINCHED WAIST" NOS 1960 (6BL8 sub)
E80CF Telefunken Germany <> bottom NOS Gold Pins rebranded Siemens 1970-1971 (6BL8 sub)
