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(!!!) (Best Pair #1) 56 Sylvania black plate NOS 1940's branded Western Electronics 1940's slightly tilted glass (6.1ma and 6.1ma) 1-2% matched
(!!!) (Best Pair #1) 5998A Sylvania JAN NOS 1980 (127/134ma and 123/136ma) (5998A=7236)
(!!!) (Best Pair #1) 6146B RCA NOS 1968-1970's (96.5ma and 100ma)
(!!!) (BEST PAIR #1) 6463 GE NOS 1965 (16.4/16.5ma and 16.8/17.8ma) (same pinout as 6350)
(!!!) (Best Pair #1) 6AR6=6098 Tungsol oval plate NOS 1951-1952 (88ma and 85ma) (1st series made)
(!!!) (Best Pair #1) 6BL7GTA GE black plates NOS 1959-1960 (50/49ma and 49/52.5ma)
(!!!) (Best Pair #1) 6BL7GTA Sylvania black plates NOS 1960's (44.5/40.5ma and 40.5/42.2ma)
(!!!) (Best Pair #1) 6F6 RCA metal can NOS 1966 (40ma and 39.6ma) 1-2% matched
(!!!) (Best Pair #1) 6GH8A GE by EI Yugoslavia NOS copper grid posts 1970's (15.4/12.5ma and 15.4/12.5ma)
(!!!) (Best Pair #1) 6GM5 Sylvania rebranded Tungsol and Sylvania NOS 1960 era (59ma and 60ma)
(!!!) (Best Pair #1) 6W4GT Westinghouse Canada black plate "D" getter halo NOS 1959 (53-53/40)
(!!!) (Best Pair #1) EL84 Siemens Halske Germany NOS 1967-1968 (48.5ma and 49ma) 1-3% matched
(!!!) (Best Pair #2) 12JB6 Sylvania NOS 1960's - 1970's (93ma and 102ma)
(!!!) (Best Pair #2) 448A Western Electric "tipped top" used/tests like new D getter halo 1965-1966 reboxed (30ma and 31.8ma) (close Gm matching)
(!!!) (Best Pair #2) 448A Western Electric tipped top used/test like new 1965 (34ma and 35ma)
(!!!) (BEST PAIR #2) 47 RCA branded ARCTURUS NOS 1940's (40ma and 40.2ma)
(!!!) (Best Pair #2) 56 Sylvania black plate NOS 1940's branded Western Electronics 1946 slightly tilted glass (5.9ma and 6.0ma)
(!!!) (Best Pair #2) 5749W=6BA6 Philips JAN by Sylvania NOS 1980's (11.4ma and 11.9ma) 1-3 matched
(!!!) (Best Pair #2) 6094 Bendix NOS and like new 1956-1957 (49.5ma and 53.5ma) (1st series)
(!!!) (Best Pair #2) 6146B RCA NOS 1970's (92ma and 91.5ma)
