(!!!) (Best Pair) GB-5931 Sylvania Gold Brand brown base NOS 1960's (Premium 5U4GB) (59-59/40 and 59-60/40)
(!!!) (Best Pair) GB-5931 Sylvania Gold Brand brown base NOS 1960's (Premium 5U4GB) (60-60/40 and 59-60/40)
(!!!) (Best Single) 5U4GB CBS NOS double "D" getters 1959 (59/40 and 60/40)
(!!!) (Best Single) 5U4GB CBS NOS double "D" getters 1959 (60/40 and 63/40)
(!!!) (Best Single) 5U4GB Hytron NOS "O" getter halo 1960 era (59/40 and 60/40)
(!!!) (Good Single) 274B Western Electric printed base NOS 1959 reboxed (53/40 and 60/40)
(!!!) (Sylvania Pair #2) 5U4GB Sylvania NOS 1970's (60-62/40 and 60-62/40)
(!!!) 5U4GB GE NOS 1971 (58/40 and 61/40)
(!!) (BEST PAIR) 5U4GB RCA NOS 1966-1970 era (58-60/40 and 60-62/40)
(!!) (Recommended Single) 5U4GA GE "D" getter NOS 1955 (57/40 and 59/50)
(!!) 5U4GB RCA NOS 1970 some white oxide flakes inside tube (55/40 and 55/40)
(!!) 5U4GB RCA used/good "D" getter 1960 a few scratches on base (53/40 and 57/40)
(!) 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)
(Best Value) 5U4GB Sylvania tests like new some vertical scratches on base 1970's (63/40 and 64/40)
(Recommended Single) 5U4GA GE "D" getter NOS 1955 slightly tilted glass (58/40 and 59/50)
(Recommended) 5U4GA Raytheon NOS double "D" getters 1956 (58/40 and 62/40)
5U4G Crosley Sylvania used/good 1950 (55/40 and 56/40) stains at top from usage
5U4G RCA used/good 1953 a few oxide flakes inside tube (50/40 and 52/40)
5U4GB Channel Master Japan 1960 double "D" getter halos low hours/tests like new (65/40 and 68/40)