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(!!!) (Best Pair 1957) 5Z3G RCA NOS 1957 in gold colored boxes slightly tilted glass (59-60/40 and 60-60/40)
(!!!) (Best Pair 1957) 5Z3G RCA NOS 1957 in gold colored boxes slightly tilted glass (59-60/40 and 60-60/40)
$ 54.99
1 pair) 5Z3G RCA NOS 1957 same date codes in gold colored boxes - slightly tilted glass
1 tube) 59/40 and 60/40
1 tube) 60/40 and 60/40
5Z3=5U4G with UX-4 pin base (same specs)
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See more: vacuum tube
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 (Best Pair 1957) 5Z3G RCA NOS 1957 in gold colored boxes slightly tilted glass (59-60/40 and 60-60/40)&Category=vacuum tube&ImageURL=http://tubeworldexpress.com/cdn/shop/products/1_98c855dc-8f88-4d55-9ba7-aed1d6fd5f9e.jpg?v=1677200456){kind=link}
 (Best Pair 1957) 5Z3G RCA NOS 1957 in gold colored boxes slightly tilted glass (59-60/40 and 60-60/40) "Pin It")