Hi Chris, you have found a 6 Kreuzer piece from the Kingdom (since 1806) of Württembert (southwest GErmany) under the reign of King Frederick I. (1806-1816). The coin (unfortunately I cannot make out the year of issue) was struck between 1806-1814.
Reference: AKS (= Arnold/Küthmann/Steinhilber, General catalogue of German coins 1800 to present) No. 49-51
Nice find!!