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6F6GT GE NOS 1952 (32ma)
6K6GT GE NOS 1956 (36ma)
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 faded printing (6.0ma)
JHY-6AK5 Hytron black plate NOS 1952 faded printing (6.2ma)
JHY-6AK5 Hytron black plate NOS 1952 faded printing (7.5ma)