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(!) (#1 81 ST-19 glass shape) 81 ST-19 Purotron made by RCA "engraved base" NOS in Sparton box 1940's (56/40) (strong output)
(!) (#1 81 ST-19 glass shape) 81 ST-19 Purotron made by RCA "engraved base" NOS in Sparton box 1940's (56/40) (strong output)
$ 27.99
1 tube) 81 ST-19 Purotron made by RCA "engraved base" NOS in Sparton box 1940's (56/40)
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 (#1 81 ST-19 glass shape) 81 ST-19 Purotron made by RCA "engraved base" NOS in Sparton box 1940's (56/40) (strong output)&Category=vacuum tube&ImageURL=http://tubeworldexpress.com/cdn/shop/products/81puro.jpg?v=1571438819){kind=link}
 (#1 81 ST-19 glass shape) 81 ST-19 Purotron made by RCA "engraved base" NOS in Sparton box 1940's (56/40) (strong output) "Pin It")