1859, German States, Rostock (City). Scarce Copper 3 Pfennig Coin. Mint Year: 1859 Denomination: 3 Pfennig References: KM-140 Mint Place: Rostock (German City State) Material: Copper Diameter: 20mm Weight: 2.55gm Rostock, officially the Hanseatic and University City of Rostock (German: Hanse- und Universitätsstadt Rostock), is the largest city in the German state of Mecklenburg ...