Welcome to the forum Leo.

The stamp you have scanned appears to be a local or 'cinderella' type? The name "Nagy", from what I have been told, is common in Hungary, so, I am only guessing at Hungary. It is not a regular postage stamp and will not be found in the regular stamp catalogues published by the major companies.
The number in it also makes me think that they could be used as revenues for some reason?? Again, this is just a guess only.
Sorry I cannot offer more.
Chimo
Bujutsu