Siege of Groningen; diamond shaped emergency coin with rounded corners. Obverse: crowned coat of arms (small stamp) between the indication of the value within the inscription. Reverse: inscription 'Do Bomben Berent dee for Gronningen the mass men dese penninck struck to a memory: besieges July 9 abandoned August 17; 1672'; Groningen; Christoph Bernhard von; bishop of M黱ster Galen; anonymous; 1672; silver (metal); engraving; h 4.5 cm x w 4.5 cm x w 28.86 gr