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(!!!!) (Best Pair #1) 5881 Tungsol rebranded Sylvania and GE 1960 era used/test like new (77.3ma and 74.5ma) (close Gm)
(!!!!) (Best Pair #1) 6201=12AT7=E81CC Philips SQ by Mullard UK gold pins NOS 1974 (10.7/10.6ma and 10.6/11.0ma) (closely matched)
(!!!!) (Best Pair #1) 6SL7GT Sylvania NOS black plates 1960's same build (2.0/2.0ma and 2.1/2.0ma) 1-3% matched (Eddie Current)
(!!!!) (Best Pair #2) 01A RCA Cunningham engraved base NOS 1930's (3.3ma and 3.2ma) (same Gm)
(!!!!) (Best Pair #2) 5670W GE NOS 1986 (9.0/8.2ma and 8.6/9.0ma) 1-3% matched
(!!!!) (Best Pair #2) 5814A Philips JAN NOS 1985 (10.5/8.2ma and 10/8.3ma) (close Gm)
(!!!!) (Best Pair #2) 5842Q Raytheon NOS 1983 (23ma and 24ma) 1-3% matched
(!!!!) (Best Pair #2) 5881 Tungsol branded RCA used/good 1963 (64ma and 65ma)
(!!!!) (Best Pair #2) 6201=12AT7=E81CC Philips SQ by Mullard UK gold pins NOS 1974 (12.8/11.2ma and 13.8/11.5ma) (closely matched)
(!!!!) (Best Pair #2) 6AC7 GE NOS 1980-1982 (10ma/11.2ma)
(!!!!) (BEST PAIR #2) 6C4WA GE JAN NOS 1980-1982 (8.4/8.4ma) 1% matched
(!!!!) (Best Pair #2) 6GH8A GE by EI Yugoslavia NOS copper grid posts 1970's (16.8/12.8ma and 16.0/13.5ma)
(!!!!) (Best Pair #2) 71A Sylvania NOS 1946-1947 branded Hytron (23.4ma and 22ma)
(!!!!) (Best Pair #2) EC92=6AB4 Siemens Halske NOS branded Philips 1967 (9ma and 9ma)
(!!!!) (Best Pair #2) EF86 ADZAM made by Valvo Germany NOS 1970 (3.1ma and 2.9ma) 1-5% matched
(!!!!) (Best Pair #2) JAN-6J5WGT Sylvania NOS 1967 (8.8ma and 9.4ma) (close Gm) 1-5% matched
(!!!!) (Best Pair #2) JHY-6AK5 Hytron black plate NOS 1952 (8.9ma and 9.3ma)
(!!!!) (Best Pair #3) 6201=12AT7=E81CC Philips SQ by Mullard UK gold pins NOS 1974 (10.2/8.8ma and 10.6/9.2ma) (closely matched)
(!!!!) (BEST PAIR #3) 6C4WA GE JAN NOS 1980-1981 (8.6/9.0ma) (Same Gm)
(!!!!) (BEST Pair #3) 6CW4 GE NOS 1974-1978 (105/60 and 107/60) (strong emission)
