A very nicely preserved piece.
Obverse: in pearl border bust in armor, to the right, in outer border legend:
SYLVI9 FRID-D-G-DVX(VI)WIRT-TEC-I-S-OLS-;
Reverse: crowned Silesian eagle in pearl border, above paws initials S-P, in outer border legend:
CO-MONTB-DO-I-HEID-STERN-&-ME-1674-;