A very nice, slightly deficient piece.
Obverse: in the pearl border bust of the ruler to the right, in the border legend:
D-G-CHRIST-DUX SIL-(XV)L-B-& WOLAU;
Reverse: in the pearl rim a Silesian eagle, in the outer rim a legend punctuated by a mint mark:
COIN NOVA-ARGENTEA-1663-;