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(!!!) (Recommended Single) 5Z3G RCA NOS 1971 (56/40 and 58/40)
(!!!) (Recommended Single) 866A RCA tests like new 1956 (58/40)
(!!!) (SINGLE) 866A RCA used/strong 1940's (58/40)
(!!!) (Single) GB-6X4WA Sylvania Gold Brand NOS "D" getter 1960 era (57/40 and 57/40)
(!!!) 249B Western Electric Engraved Base NOS 1930's in 249C box (58/40)
(!!!) 314A Western Electric Engraved base NOS 1930's (full-wave rectifier) (56/40 and 63/40)
(!!!) FAA-6X4WA Sylvania NOS 1965 (55/40 and 57/40)
(!!) (Best Pair 1981) 412A Western Electric NOS "O" getter halo 1981 (53-53/40 x 2 tubes)
(!!) (Best Pair) 412A Western Electric NOS "D" getter halo 1959 (51-52/40 x 2 tubes)
(!!) (Best Pair) 5726=6AL5 Sylvania JAN NOS 1980 (45-46/40 and 46-46/40)
(!!) (Best Pair) GB-5726=6AL5 Sylvania Gold Brand Gold Pins NOS 1960's (49-50/40 and 50-50/40)
(!!) (BEST PRICE!) 6W4GT RCA NOS (10 tubes for $27.99)
(!!) (Best Single) 5AS4A RCA NOS 1958 (58/40 and 58/40)
(!!) (Best Single) 5AS4A RCA NOS 1964 slightly tilted glass (56/40 and 56/40)
(!!) (BEST SINGLE) JAN-CRC-5R4GY RCA brown base NOS 1943-1945 (52/40 and 54/40)
(!!) (Best Value Pair) GZ34 RSD by Matsushita NOS similar sound and build to Mullard NOS 1970's (59-60/40 and 59-60/40 x 2 tubes)
(!!) (Display tube) 249A Western Electric Engraved Base 1930 era used/display tube (does not function)
(!!) (Pair) 12X4 RCA black plates NOS 1970 (44-47/40 and 44-47/40)
