Obviously these are not actually Notgeld, but museum tickets from the Kreismuseum Bitterfeld featuring the art from Bitterfeld's Notgeld notes of 1921. I don't know the exact date of issue, but I would guess 1990s to 2001 based on the very thick plastic-feeling photo paper. They can't be any later than 2001 since they are denominated in the Deutschmark. These were found in a Notgeld collection and I can't find them anywhere else on the Internet.