A nice piece. A rarer item in the trade.
Obverse: in the pearl rim the Grand Master's shield, in the outer rim the legend:
*MAGST○HINRICVS○OVA;
Reverse: in the pearl rim, the Order's shield; in the outer rim, the legend beginning with:
COIN○DNORVM○PRV;
Silver, diameter 20 mm, weight 1.32 g.