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(!!!!) (Best Pair) 5R4GB GE black base NOS 1981 (50-52/40 and 50-53/40 x 2 tubes)

(!!!!) (Best Pair) 5R4GB GE black base NOS 1981 (50-52/40 and 50-53/40 x 2 tubes)

$ 39.99

1 pair) 5R4GB GE black base NOS 1981 (MS)

1 tube) 50/40 and 53/40

1 tube) 50/40 and 52/40

 

5R4GB black base = 5R4GYB with brown base

See more: vacuum tube
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