(!!!) (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)
(!!) (Best 3B28) 3B28 Chatham USA NOS 1952 in white boxes (1 in stock)
(!) 3B28 RCA tests like new some scratches on base 1955 (1 in stock)
3B28 Continental Electronics used/test like new 1940's (2 in stock)
6G6G National Union NOS 1950's (13.5ma)
6G6G National Union NOS 1950's (14.6ma)
6G6G RCA NOS 1940's (16ma)
