50 stuiver noodmunt stad Groningen 1672

Voorzijde: . IVRE . – . ET . TEMPORE . – . 1672 ., gekroond provinciewapen tussen gesplitste waardeaanduiding
Keerzijde: blanco
 
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In 1672 Groningen was besieged by the Prince-Bishop of Münster, Bernhard van Galen. He believed that he could lay claim to the areas in and around Groningen, because these had once belonged to his diocese. The young Dutch Republic was attacked from all sides in 1672 and so he saw his chance to attack the relatively unprotected north.
The bishop’s troops laid siege to Groningen on 21 July. The decisive factor for the eventual withdrawal was that his ally, the Elector of Cologne, had suffered a defeat at the wierde Nienhuis and his own troops had been repulsed at Noordhorn, endangering his back cover. In addition, the bishop had failed to block the supply to the city. He approached from the south, but the city remained accessible from the north. On August 28, von Galen was forced to retreat with only half of his army remaining.