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In Reply to: GE 12AT7/ECC81 Great Britain maybe Mullard? posted by B. Scarpia on April 18, 2021 at 09:24:34:
Does it have 4 ridges on top? That's a usual indication for Amperex or Mullard or Siemens.
Joe
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- RE: GE 12AT7/ECC81 Great Britain maybe Mullard? - Joe Appierto 10:04:05 04/18/21 (0)