6P5G RCA NOS 1940's (5.7ma Gm=1400)
6P5G Sylvania NOS 1940's (4.8ma Gm=1300)
6P5GT Sylvania NOS 1947 (5.0ma Gm=1400)
6P5GT Sylvania NOS 1947 in white box (5.3ma Gm=1400)
