Quote:
Can't see any cancellation signs, and gum on revers
Hektor, you keep asking the same things over and over again, and getting the same response, over and over again. Why do you think posting yet another stamp with either gum or no gum will change any answers?
Answer yet again: These stamps are completely and absolutely normal. If you can't find any evidence of a cancel on the printed side, then it could be a mint stamp. If you can't find any gum on the other side ... that means nothing. Gum may have been soaked off for a variety of reasons by previous owners. (Even if you think they were untouched for years and years.)
So please, no more pictures or questions in this thread unless it actually is a "printed on gum side" error. If you have any OTHER types of questions, just start a completely new thread.