(!!!!) (Pair) 0D3 Hytron NOS and like new 1948 (argon)
(!) (1 PAIR) 0D3 Tungsol used/test like new 1950's (argon)
(!) (Recommended Pair) 0D3 RCA NOS 1963-1966
(!) 0D3 Hytron NOS 1951 (argon)
0D3 CBS NOS 1950 era (argon)
0D3 Hytron like new 1949 (argon)
0D3 RCA low hours/tests like new 1975 slightly tilted glass - rattle inside base (argon)
0D3 RCA tests like new 1940's (argon)
0D3 Tungsol NOS 1950's slightly tilted glass (argon)
0D3A Sylvania NOS 1970's (1 pair)
JAN-CHY-0D3 Hytron NOS 1940's (argon)
JAN-CRC-0D3 RCA used/tests strong 1940's (argon)
VR-150=VT-139=0D3 Sylvania NOS 1940's (argon)