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(!) (READ REVIEW) CV1377=GZ34 Mullard Blackburn UK NOS 1976
(!) (READ REVIEW) GZ34 Mullard UK shield logo NOS 1962
(!) (READ REVIEW) GZ34 Raytheon Japan by Matsushita NOS similar sound and build to Mullard NOS 1970's (59/40 and 59/40 x 2 tubes)
(!) (SINGLE) 5U4GB RCA used/strong 1967 (56/40 and 61/40)
(!) (~ Best AZ50 Pair ~) AZ50 Miniwatt Dario France NOS 1954 (rare pair)
(!) 5AU4 GE NOS 1961 (52/40 and 54/40)
(!) 5U4G Sylvania rebranded Motorola used/good 1951 (48/40 and 52/40)
(!) 5U4G Windsor by Sylvania used/good 1947 faded getter (54/40 and 56/40)
(!) 6X4 Philco by Sylvania NOS "D" getter 1959 (54/40 and 55/40)
(!) 80 Delco by Sylvania ST-shape used/tests like new 1947 rattle inside base (57/40 and 60/40)
(!) 80 GE Uruguay GT-shape NOS 1950's tilted glass (58/40 and 60/40)
(!) 80 Hygrade Sylvania experimental tube used/strong 1940 era (54/40 and 52/40)
(!) 80 Ken Rad ST-shape tests like new mid-1940's (52/40 and 54/40)
(!) 80 National Union NOS 1950 era (54/40 and 58/40)
(!) 80 Sylvania GT-shape NOS tilted glass (52/40 and 56/40)
(!) 80 Tungsol ST-shape tests like new 1940's (54/40 and 56/40)
(!) 80 Tungsol ST-shape tests like new 1940's (57/40 and 60/40)
(!) 80 Tungsol ST-shape used/good 1946 (52/40 and 54/40)
(!) EZ80 Philips Miniwatt France used/tests like new 1961 (63/40 and 64/40)
(!) EZ80=6V4 Tungsram Hungary NOS 1960's (58/40 and 60/40)
