I could understand putting my initials on an amp that I built especially if I was proud of my work. I don't think I'd ever put my initials on a tube that I didn't build?
I am not saying this isn't authentic. I'm saying it wouldn't make sense to me personally to initial tubes.
OK I'll say it, "those are bogus". I don't think there are too many Dumble amps in Thailand missing their tubes. Dumble liked writing all over the tubes but it was test information not a signature.
CW
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