1802, Oldenburg (Duchy), Peter Frederick William. Copper ½ Grote Coin.Mint Year: 1802 Condition: About XF! Mintage: 78,000 pcs. Denomination: ½ Grote Reference: KM-150 Material: Copper Diameter: 19mm Weight: 3.63gmThe House of Oldenburg is a European royal house of North German origin. It is one of Europe’s most influential royal houses with branches that rule or have ruled in Denmark, ...