(!!!) (Best Pair) 5R4GY RCA brown base NOS 1955 (50-52/40 x 2 tubes)
(!) (BEST VALUE PAIR) 5R4GA GE Amperex NOS 1976 - vertical scratches on bases (50-53/40 and 50-50/40)
5R4GYA GE branded Westinghouse NOS 1960's (50/40 and 53/40)
