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(!!) 5Z3G Sylvania NOS 1950 (56/40 and 58/40)
(!!) 5Z3G Westinghouse NOS 1957 (59/40 and 61/40)
(!!) 6AU4GTA RCA used/good 1960's (89/60)
(!!) 6AU4GTA Sylvania NOS 1970's
(!!) 6X4 GE NOS gray plates "D" getter NOS 1961 (56/40 and 56/40)
(!!) 6X4 RCA NOS 1969 (50/40 and 51/40)
(!!) 80 Fapesa Miniwatt Argentina NOS 1950's faded printing (52/40 and 56/40)
(!!) 80 GE GT-shape NOS 1957 slightly tilted glass (56/40 and 60/40)
(!!) AZ1 Miniwatt Dario France NOS 1954-1955 (1 in stock)
(!!) EZ35=6X5GT Mullard UK used/tests like new 1950-1955 small crack in base (52/40 and 57/40)
(!!) JAN-5Z3G RCA NOS tilted glass (56/40 and 56/40)
(!!) JAN-CRC-5V4G RCA black plates used/tests like new 1958 (62/40 and 62/40)
(!) (#1 81 ST-19 glass shape) 81 ST-19 Purotron made by RCA "engraved base" NOS in Sparton box 1940's (56/40) (strong output)
(!) (Best Pair #2) 5726=6AL5W Raytheon NOS 1960's (48-48/40 and 48-48/40)
(!) (BEST PAIR #2) 6663=6AL5 GE NOS 1962-1965 (46-46/40 and 47-48/40) (Copy)
(!) (BEST PAIR) 12AL5 RCA NOS (50-50/40 and 51-51/40)
(!) (BEST PAIR) 12AL5 RCA NOS 1973 (50/40 and 50/40 x 2 tubes)
(!) (BEST PAIR) 6663=6AL5 GE NOS 1963-1964 (47-47/40 and 47-48/40)
(!) (BEST PAIR) 6AL5 GE NOS 1960's (48-48/40 and 48-50/40)
(!) (BEST PAIR) 6CA4 RCA NOS 1960's - 1972 (54-56/40 and 54-54/40) (Wright, Counterpoint, Cary, Zanden)
