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(!!!!) (Best Pair) 5R4GB GE black base NOS (48-51/40 and 50-52/40 x 2 tubes)

(!!!!) (Best Pair) 5R4GB GE black base NOS (48-51/40 and 50-52/40 x 2 tubes)

$ 37.99

1 pair) 5R4GB GE black base NOS 

1 tube) 48/40 and 51/40 

1 tube) 50/40 and 52/40 

 

5R4GB black base = 5R4GYB with brown base

See more: vacuum tube
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