Prostynia, Choszczno County in West Pomeranian Voivodeship (north-west Poland)
County Durham | Orange County | County Cork | St. Louis County, Minnesota | County Galway | County Mayo | county | Montgomery County | Los Angeles County Museum of Art | Lancashire County Cricket Club | Westchester County, New York | Nassau County, New York | County Antrim | Rockland County, New York | County Down | Washington County | Hillsborough County | Derby County F.C. | County Meath | County Donegal | Erie County, New York | County Tyrone | County Tipperary | County Louth | County Armagh | Wayne County, Michigan | Somerset County Cricket Club | Los Angeles County | Jefferson County | Glamorgan County Cricket Club |
In 1938 the districts of Arnswalde and Friedeberg (Neumark) were merged into a new district called Posen-West Prussia frontier district, which was transferred from Brandenburg to the adjacent more northerly Province of Pomerania.