(!!!) (Best Value Pair) 5Z3G RCA NOS 1957 in gold colored boxes slightly tilted glass (56-59/40 and 57-60/40)

1 pair) 5Z3G RCA NOS 1957 same date codes in gold colored boxes – slightly tilted glass

1 tube) 56/40 and 59/40

1 tube) 57/40 and 60/40

5Z3=5U4G with UX-4 pin base (same specs)

– Korneff 45 SET

– Emotive Audio SIRA