1877, Hamburg (Free Hanseatic City). Beautiful Gold 20 Mark Coin. Mint Date: 1877 Reference: KM-602. Denomination: 20 Mark Mint Place: Hamburg (J) Material: Gold (.900) Diameter: 23mm Weight: 7,94gm Obverse: Shield of Hamburg (two stars above cross-topped castle with three towers), supported by lions and adorned with a plummed helmet. Legend: FREIE UND HANSESTADT HAMBURG / J R ...