(!!!) (Best Pair) 5Z4 RCA NOS 1959 (50-50/40 and 51-51/40)
$ 21.99
1 pair) JAN-CRC-5Z4 RCA NOS 1959
1 tube) 50/40 and 50/40
1 tube) 51/40 and 51/40
See more: vacuum tube
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 (Best Pair) 5Z4 RCA NOS 1959 (50-50/40 and 51-51/40)&Category=vacuum tube&ImageURL=http://tubeworldexpress.com/cdn/shop/files/2_fa42c186-5eca-465e-a7a5-ee5d96ad6bbc.jpg?v=1744839017){kind=link}
 (Best Pair) 5Z4 RCA NOS 1959 (50-50/40 and 51-51/40) "Pin It")