Silver, 38mm diameter, 17.95 grams.  WILHELM D:G· PR· C· A·D· B· ET· S His armoured bust right.  Rv. MON· NOV· PR· AN HALT· LI· BERNB Crowned arms, 16 79 above B A at sides, 2/3 in oval below.  KM 1.1, Dav.216. Plotzkau, mint master Bastian Altmann.  Slightly porous flan, otherwise about VF