(!!!!) (Best Pair) 0A3 GE NOS 1956-1961 (neon)
(!!!!) (Best Pair) 5R4GB GE black base NOS 1981 (50-52/40 and 50-53/40 x 2 tubes)
(!!!!) (Best Pair) 5R4GB GE black base NOS 1981 (51-53/40 and 51-54/40 x 2 tubes)
(!!!!) (Best Pair) 5R4GB GE black base NOS 1981 (51-54/40 and 52-55/40 x 2 tubes)
(!!!!) (BEST PAIR) 5R4GYB RCA and RCA branded Westinghouse NOS 1961-1970 (50-52/40 and 50-53/40)
(!!) (BEST PAIR 1950's) 0C3 CBS NOS 1955 (argon)
(!!) (SINGLE) 5R4GYB RCA NOS 1963 large getter (48/40 and 50/40)
(!!) 0C3 Sylvania branded GE NOS 1972-1976 (1 Pair)
(!!) 5R4GB GE NOS 1983 (54/40 and 56/40)
(!!) 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 RCA used/test like new 1960-1962 (argon)
(!) (BEST PAIR) 0C3 RCA NOS - 1 tube branded GE 1959 and 1962 (1 pair) (argon)
(!) 0C3 RCA used/test like new 1951 (1 pair)
(!) 0C3=VR-105 GE tests like new 1969 argon
(!) 0D3 RCA NOS 1976 slightly tilted glass (argon)
(PAIR) 0A3 CBS NOS 1960 era same build (neon)
0A3 GE used/good 1959 (neon)
