A rare forgery of the era printed on paper with the correct "honeycomb" watermark.
Miłczak notes a diversionary forgery, but with a different watermark.
Not caught by the issuer. No stamping or markings.
A natural piece.
A great curiosity, as pieces with the characteristic zigzag watermark, caught and properly stamped, dominate the collector's trade.
An item for specialized counterfeit collections.
