One vintage NOS RCA 6201 tube.  Military grade, labeled 12AT7WA on the glass.  Black plate and triple mica spacers.  This is as great as a 12AT7 gets.

Condition:  NOS, original box.  Tested on a B&K 747B or Hickok 539C.

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Payment must be received with 7 days of purchase.

Thanks for looking and please check our store for many more great vintage tubes!