Munchen Seal, Image & Found by Quozzy.
Found in Germany, 23mm, 18.2g.
Both sides have a circular border of pellets. On the first side is the number 500 possibly with a star above and below it. The other side has GRDP CASSE on two straight lines with a possible flower head beneath and below that MüNCHEN. curved upwards. Seal has a bevelled profile, 6mm thick along the central axis tapering to the edge either side.