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(!!!!) (Best Pair) 5R4GB GE black base NOS 1981 (51-53/40 and 51-54/40 x 2 tubes)

(!!!!) (Best Pair) 5R4GB GE black base NOS 1981 (51-53/40 and 51-54/40 x 2 tubes)

$ 39.99
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1 pair) 5R4GB GE black base NOS 1981

1 tube) 51/40 and 53/40 (MS)

1 tube) 51/40 and 54/40 (NS)

 

5R4GB black base = 5R4GYB with brown base

See more: vacuum tube
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