Siege of Mantua; emergency coin of twenty kreutzer; minted by General Gorkowski in honor of Ferdinand I; emperor of Austria; Silver emergency coin. Front: man's chest piece with laurel wreath to the right inside the inscription. Reverse: coat of arms; worn by crowned; double-headed eagle with sword and apple in claws within an inscription; Mantua; Ferdinand I (Emperor of Austria); Gorkowski; Monogrammist GM; 1848; silver (metal); striking (metalworking); d 2.7 cm x w 6.54 gr