5Z4 RCA NOS mid-1940's (50/40 and 51/40)
5Z4 Rogers Canada NOS 1959 (51/40 and 51/40)
5Z4P Chinese (Best sub is 5Z4G or GZ30)
6012 RCA low hours/test like new 1958 in original boxes (4 in stock)
6012 RCA NOS 1958 (1 in stock)
6012 RCA NOS 1961 (1 in stock)
6012 Sylvania NOS
6014=C1K Cetron USA used/good (5 in stock)
6106 Bendix used/good 1950's small hairline crack in base (50/40 and 53/40)
6202 GE 5 Star used/like new 1958 (52/40 and 52/40)
6202 GE branded National NOS 1960's (51/40 and 51/40)
6202 GE rebranded 6X4WA GE NOS 1966 (54/40 and 54/40)
6202 GE used/good 1960's (51/40 and 51/40)
6202 RCA NOS 1972 (52/40 and 54/40)
6202 RCA used/good 1974 (52/40 and 52/40)
6203 GE 5-Star NOS 1965 (54/40 and 54/40)
6203 US Brands NOS (11 in stock)
623 National USA rectifier NOS (sold out)
6AF3 Sylvania NOS (8 in stock)
