6SA7GT Delco NOS 1940's (101/60)
6SA7GT Delco NOS 1940's (94/50)
6SA7GT GE NOS 1943 (96/60)
6SA7GT National Union NOS 1950 era (100/60)
6SA7GT Sylvania NOS 1954 (100/60)
6SA7GTY National Union NOS 1952
