500 000 000 Mark

This is Rheinland notgeld from the peak of the German hyperinflation, issued by a joint administrative grouping of three Prussian Rhine Province districts — Cochem, Simmern, and Zell — pooling authority to produce emergency currency when the Reichsbank could not keep denominations pace with price movements. By late 1923, 500 million marks would barely cover a loaf of bread, and many such district-issued notes were superseded by even larger denominations within weeks of printing.

The engraver credit "Fünfhundert Millionen Mark" in the metadata is almost certainly a misread of the face-value text, not an actual engraver name.