RARE German Coin 5 Mark 1900 J Free City Hamburg Hansestadt Emperor Reich 90% Silver Empire Germany WW1 – very rare nice high quality. Genuine World War 1 Authentic Coin. Minted by the German, from Germany. Excellent Coin for Coin Collectors and great Investment! Genuine Historical Artifact – very rare. Imagine holding a piece of History in your Hands!! Some pieces have already been touched by famous personalities. See at original Picture and look at my other items!