5Z3G RCA used/good 1956 (46/40 and 48/40)
5Z3G TRIAD by RCA used/tests like new 1940's (52/40 and 52/40)
6A8G Sylvania NOS 1951-1952 (44/29)
6AQ5A=6669 European NOS branded Siemens NOS 1975 (48.5ma)
6AR6 Raytheon black plate used/good 1952 (67ma)
6B4G Sylvania rebranded Delco NOS separate plates 1952 (81ma)
6B4G Sylvania rebranded RCA used/good 1953 (77.5ma)
6F6G National Union black plate NOS 1951 (40.5ma)
6F6GT Sylvania branded Raytheon NOS 1951 (43ma)
6K6GT Silvertone by Silvertone used/good 1956 hairline crack in base (38ma)
6V6GT GE Delco used/good crack in base 1952 (36ma)
7F8W Sylvania NOS rebranded United 1952 (42/25 and 44/25) (best 7F8W)
JHY-6AK5 Hytron black plate NOS 1952 in white box (9.2ma)