(!!!!) (Best 6201 Pair) 6201=E81CC=12AT7 Valvo Hamburg Germany branded Philips Miniwatt SQ NOS 1962-1963 (10.0/10.6ma and 10.0/10.8ma) 1-2% matched
(!!!) (BEST SINGLE) 6201=12AT7 Valvo Germany Gold Pins branded Philips Miniwatt 1962 (11.4/12.0ma)
EF86 Amperex made in Hamburg Germany used/good 1972 (2.5ma)
