(!!!) (BEST PAIR) JAN-CYS-1616=1616 Sperti, Inc. NOS made by RCA 1944 (Space Tech Labs power supply STR-104)
(!!) (1 Pair) 6G6G RCA NOS branded RCA and Raytheon 1945-1950 era same build (13.6ma and 14.0ma)
(!!) (1 Pair) 6G6G RCA NOS branded Sylvania and GE 1940's same build (16.2ma and 17.5ma)
3B28 Continental Electronics used/test like new 1940's (76/40)
3B28 Electronic Enterprises NOS 1960 (79/40)
3B28 RCA NOS 1955 (80/40)
3B28 RCA NOS 1972 (79/40)
3B28 RCA tests like new some scratches on base 1955 (78/40)
6G6G National Union NOS 1950's (13.5ma)
6G6G National Union NOS 1950's (14.6ma)
6G6G RCA NOS 1940's (16ma)
