(!!!) 242 Duovac USA brass base used/tests like new 1930's small slit in plate (120ma)
284D Amperex brass base low emission display tube 1940 era
482B=182 Sparton engraved base tests like new 1930's (21ma Gm=2000)
HY51A Hytron NOS 1940's (84/42) (transmitting triode)
