(!) (Best Single) 5Z3G Hytron NOS 1947 (51/40 and 51/40)
$ 29.99
1 tube) 5Z3G Hytron NOS 1947
51/40
51/40
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 (Best Single) 5Z3G Hytron NOS 1947 (51/40 and 51/40) "Pin It")
1 tube) 5Z3G Hytron NOS 1947
51/40
51/40