Emergency coin of three kreutzer of siege of Prague; emergency coin of Maria Theresia; German empress; Obverse: bust of woman with diadem to the right inside an inscription. Reverse: crowned double-headed eagle with coat of arms for chest; below: value indication in cartouche within a circle; Prague; Maria Theresia (Roman-German Empress); anonymous; Praag; 1754; tin (metal); striking (metalworking); d 2.2 cm x w 2.38 gr