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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)
5Z3P Chinese (substitute is 5U4G or 5U4GB)
5Z4 CBS NOS 1954 (53/40 and 55/40)
5Z4 Ken Rad NOS 1946 (53/40 and 53/40)
5Z4 Ken Rad NOS 1949 (53/40 and 53/40)
5Z4 RCA JAN NOS 1959 (51/40 and 51/40)
5Z4 RCA NOS mid-1940's (50/40 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)
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 tests like new no printing 1960's (54/40 and 56/40)
6202 GE used/good 1960's (51/40 and 51/40)
6202 RCA low hours/like new 1969 (55/40 and 60/40)
