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6080 RCA black plates used/good 1956 broken guide pin (66/77ma)
6080WB Raytheon black plates NOS 1966 (95/120ma)
6080WC GE JAN NOS 1987-1988 broken center guide pin (72/82ma)
6100=6C4WA GE 5 star triple mica NOS 1959-1960 (12.6ma) (Premium 6C4)
6111 France NOS 1962 (6.8/7.0ma) (close triode balance) (Same Gm)
6111 France NOS 1962 (7.4/9.8ma)
6146A GE NOS 1960's (82ma)
6146A GE NOS 1965 (69ma)
6189W GE JAN NOS 1981 (8.4/9.0ma)
6201=12AT7 GE "5 STAR" used/good triple mica "U" getter halo, copper grid posts, gray plates, 1957 (6.2/7.8ma)
6202 GE branded National NOS 1960's (51/40 and 51/40)
6202 GE rebranded 6X4WA GE NOS 1966 (54/40 and 54/40)
6202 GE tests like new no printing 1960's (54/40 and 56/40)
6202 GE used/good 1960's (51/40 and 51/40)
6202 RCA low hours/like new 1969 (55/40 and 60/40)
6202 RCA NOS 1972 (52/40 and 54/40)
6202 RCA used/good 1974 (52/40 and 52/40)
6203 GE 5-Star NOS 1965 (54/40 and 54/40)
6350 GE 5-Star like new "O" getter 1962-1963 era (9.6/9.8ma)
6350 GE 5-Star NOS 1963 (13.2/12ma)
