Untitled Document1848, (Oldenburg-)Birkenfeld, Augustus. Scarce Silver Groschen Coin Mint Year: 1848 Mintage: 63,000 pcs. Denomination: 1 Groschen References: KM-9 (listed under Birkenfeld at $80 in XF!). Material: Silver (.220) Diameter: 18mm Weight: 2.17gmThe House of Oldenburg is a European royal house of North German origin. It is one of Europe’s most influential royal houses ...