(!!!) (Best Pair) 81 ST-19 RCA NOS original boxes 1940's (1 pair)
By Tube World
$ 79.99
1 pair) 81 ST-19 RCA NOS original boxes 1940's
1) 56/40
1) 56/40
See more: vacuum tube
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 (Best Pair) 81 ST-19 RCA NOS original boxes 1940's (1 pair)&Category=vacuum tube&ImageURL=http://tubeworldexpress.com/cdn/shop/products/1_4fe8ffe1-a286-4039-a13c-68fdc10d70c6.jpg?v=1649337718){kind=link}
 (Best Pair) 81 ST-19 RCA NOS original boxes 1940's (1 pair) "Pin It")