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(!!!) (BEST PAIR) 5R4GYB RCA branded Westinghouse NOS 1966 (54-52/40 and 52-52/40)
(!!) (Recommended Pair) 0C3 Sylvania NOS 1953-1970 same build (argon)
(!!) (SINGLE) 5R4GYB RCA branded Westinghouse NOS 1962 (50/40 and 52/40)
(!!) 5R4GYB RCA like new 1963 a few oxide filament flakes inside tube slightly tilted glass (50/40 and 52/40)
(!!) 5R4GYB RCA rebranded Raytheon NOS 1960's (50/40 and 53/40)
(!!) 5R4GYB RCA used/very good 1961 (48/40 and 51/40)
(!) (1 PAIR) 0C3 GE branded 0C3A NOS 1976 (argon)
(!) (BEST PAIR) 0C3 RCA NOS - 1 tube branded GE 1959 and 1962 (1 pair) (argon)
(!) (Best Pair) 0D3 RCA NOS 1951 (argon)
(!) (Best Value Pair) 0A3 CBS NOS 1960 era same build (neon)
(!) (PAIR) 0A3 RCA branded Marshall and GE used/strong 1950's (1 Pair) (neon)
(!) GL-0C3=VR-105 GE NOS 1954 in white box (argon)
(READ REVIEW) 0D3 RCA NOS 1940's in white boxes (argon)
0A3 GE NOS 1963 slightly tilted glass (neon)
0A3 US Brands used/good (4 in stock)
0C3 CBS NOS 1955 (argon)
0C3 GE NOS 1946 (argon)
0C3 GE NOS 1960's (argon)
0C3 RCA NOS 1951 argon
0C3 RCA NOS 1974 rattle in base from dried glue particles - argon
