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Original Message
RE: Do All Telefunken 12AX7 Tubes Have the Diamond on the Bottom?
Posted by JNS on July 12, 2012 at 06:53:05:
I think you mean "ECC83". To be a true Tele, based on everything I have heard and also what I have experienced it must have a diamond on the bottom. I have seen true Tele with both seams and no seams on the tube top.