A very nice piece.
Typical sheet metal defects for this issue.
Obverse: in the pearl border the figure of a knight with a coat of arms on a shield, in the outer border the legend:
*MO-ARGPRO-CONFOE-BELG-WEST F-RI;
Reverse: crowned coat of arms of the Netherlands, on the sides the date 16-20, in the outer rim the legend:
*CONCORDIA-RES-PARVAE-CRESCVNT;