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(!!!) (BEST PAIR) 5R4GYB RCA branded Westinghouse NOS 1966 (54-52/40 and 52-52/40)
(!!) (Best Pair #2) 0C3 RCA NOS 1951 and 1957 (argon)
(!!) (Best Pair #2) 0D3 RCA branded GE NOS 1962-1966 (argon)
(!!) (Best Pair) JAN-CHY-0C3=VT-200 Hytron NOS 1945 (argon)
(!!) (Recommended Pair) 0C3 Sylvania NOS 1953-1970 same build (argon)
(!!) (SINGLE) 5R4GYB RCA branded Westinghouse NOS 1962 (50/40 and 52/40)
(!!) (SINGLE) 5R4GYB RCA NOS 1962 large getter (52/40 and 55/40)
(!!) 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)
(!) (1 PAIR) 0D3 Tungsol used/test like new 1950's (argon)
(!) (BEST PAIR) 0C3 RCA NOS - 1 tube branded GE 1959 and 1962 (1 pair) (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)
