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(!!!) (Best Pair) 6A7G Marconi Radiotron Canada NOS 1950 era (47/29 and 47/29)
(!!!) (Recommended Pair) 12BZ7 National Union branded Admiral and Sylvania "U" getter NOS 1960-1961 era (1.6/1.6ma and 1.7/1.8ma)
(!!!) (Recommended Pair) 12BZ7 RCA NOS 1964 and 1968 (1.8/1.8ma and 1.8/1.9ma)
(!!!) 6BL7GTA GE branded Marconi NOS 1960 era tilted glass (46/53ma) (High Gm) strong single
(!!) (Best Pair) 6A7G Marconi Radiotron Canada NOS 1950 era
(!!) (GOOD SINGLE) 12BZ7 CBS NOS large "U" getter 1955-1960 faded printing (1.9/2.5ma)
(!) (BEST PAIR) 12D4 GE gray plate NOS 1961-1964 (52/40 and 52/40)
(!) (BEST PAIR) 12D4 RCA black plate NOS 1960's (52/40 and 52/40)
(!) (Best Single) 6111 France NOS 1962 (7.6/8.2ma)
(!) (Best Single) 6111 France NOS 1962 (7.8/8.2ma) (best triode balance)
(!) (Best Single) 6111 France NOS 1962 (8.4/9.5ma)
(!) (Best Single) 6111 Sonotone by GE NOS 1962 (9.8ma and 10.2ma)
(!) 6111 Sonotone by GE NOS 1962 (5 in stock)
0A3 GE NOS 1963 slightly tilted glass (neon)
12D4 GE NOS
12D4 GE NOS 1964 (52/40)
12D4 Philco by Sylvania used/tests like new 1959 (62/40)
12D4 Raytheon used/good 1960's (46/40)
12D4 RCA NOS 1960's tilted glass (52/40)
12D4 WG Co. by Sylvania used/strong 1959 (53/40)
