Willem I and the Mayor of Amsterdam; Silver Medal with a hole in it. Obverse: man's chest piece in very high relief within a circle. Reverse: four mayors of Amsterdam seated at a table within a circle.; Amsterdam; Willem I (Prince of Orange); Cornelis de; Lord of Zuid-Polsbroek Graeff; Joan Huydecoper van Maarseveen (I); Jan van de Poll (1597-1678 ); Hendrick Dircksz. Mirror; Wouter Muller; 1655; silver (metal); founding; d 8.1 cm x w 81.89 gr