The last voucher of the Magistrate of Gdansk.
This is its rare version with the stamp "Ungültig!" - withdrawn from circulation. As Czeslaw Miłczak describes it, "Pieces without the stamp are mostly found on the collector's market."
This may have been influenced by the inflation of the German mark, which was gaining momentum. The exchange of these vouchers most likely took place in April 1922 (WMG Senate decree), when the value of the voucher was already several times too low even to send a postcard.
The celadon-green variety (one of two for this denomination).
