5691 RCA Red Base Black Plates used 1948 (2.2/2.4ma) (Gm=62% and 75%)
6201=12AT7 GE "5 STAR" used/good triple mica "U" getter halo, copper grid posts, gray plates, 1957 (6.2/7.8ma)
6350 Sylvania black plates "U" getter halo used/good 1956, faded printing (8.2/8.8ma)
6CS7 GE Canada NOS black plates 1960's (18/11.2ma)
6CS7 Tungsol branded Lafayette NOS black plates 1960 era (24/12.4ma)
6CS7 Tungsol NOS black plates 1960's (21/10ma) (internals like Sylvania)
6J5WGT Raytheon black ribbed plate NOS 1959 (11.4ma)
6K6GT Silvertone by Silvertone used/good 1956 hairline crack in base (38ma)
7AF7 Sylvania branded Raytheon NOS gray round plates NOS 1948 printed in 1952 (10/10ma) 1-2% section balance
7AF7 Sylvania branded RCA NOS black round plates NOS 1956 (7.0/7.6ma)
7N7 Sylvania branded RCA chrome top used/good 1956 (6.6/8.4ma)
866A GE low hours/like new 1940's
EL34 Holland brown base used/good faded top getter 1961 (78ma)