0A3 RCA branded Marshall Electronics used/good 1950's (neon)
0A3 RCA NOS 1971 (neon)
0A3 US Brands used/good (4 in stock)
0A3 Westinghouse NOS 1940's - 1950's small crack in base (neon)
0C3 RCA NOS 1951
0C3 RCA used/test like new 1951 (1 Pair)
0C3=VR105 GE used/tests like new 1970 (argon)
0C3=VR105 RCA used/good 1940's
0C3=VR105 RCA used/good 1948 (argon)
0D3 CBS NOS 1950 era (argon)
0D3 Hytron like new 1949 (argon)
0D3 RCA low hours/tests like new 1946 (argon)
0D3 RCA used/good 1954 (argon)
0D3 Sylvania NOS 1960's (argon)
0D3 Tungsol NOS 1960 era (argon)
5R4GYB RCA brown base like new 1970's part of glass partially melted into bottom mica (48/40 and 49/40)
5R4GYB RCA brown base NOS 1970's part of glass melted into bottom mica (50/40 and 53/40)
5R4GYB RCA used/very good 1964 (51/40 and 54/40)
5R4GYB Sylvania NOS 1970's (52/40 and 49/40)
EL83 Amperex Bugle Boy France like new 1965 (49ma)
