I have found this stamp in an pretty common album (although an old one), and really didn't expect to find this kind of stamp in it... so, I supposed that it is a forgery... however, I have compared to examples found on web, and, if it is a forgery, looks like a pretty good one... didn't find any major faults... stamp is on a thin paper, doesn't have a gum.
Anyone familiar with this issue?
On 1st and 2nd scan are original colours, and the 3rd is enchanced in a photo editor, so that details could be visible easier.


