An interesting printing error. Undoubtedly rare and also difficult to catch.
In the lower right corner reflected in the negative the denomination marking and and a strip fragment from the reverse of another piece. Discussed in comparison with another piece on film.
Subject of this auction piece 100 zloty series AY 7534593 with printing error. The other one shown in the photos or on the video is attached only in comparison inches and is not the subject of the auction.
