Most likely Russian origin. They a have a different code number than Western tubes.
any clues? on mystery TOOBS...
I found a Quad of Tubes! no markings other than 6H1C ? no brand name on them? diamond logo, or stamp w/the #30
inside of it...or the other marking is a big circle with the (6H1C) inside of it. So can you help a brother out, and tell me what these are?
thanks in advance
Craig
inside of it...or the other marking is a big circle with the (6H1C) inside of it. So can you help a brother out, and tell me what these are?
thanks in advance
Craig
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