1692, Brunswick-Wolfenbuttel. Silver 12 Mariengroschen (1/3 Thaler) CoinMint Year: 1692 Reference: KM-570. Denomination: 12 MariengroschenDiameter: 32mm Weight: 6.33gm Material: Silver The Principality of Brunswick-Wolfenbüttel was a principality within the Duchy of Brunswick-Lüneburg, whose history was characterised by numerous divisions and reunifications. Various dynastic lines ...