1 tube) 81 ST-19 Purotron made by RCA “”engraved base”” NOS in Sparton box 1940”s (56/40)
(!) (#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)
$8.40 $27.99
$8.40 $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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