1923 10,000mark notgeld coin, about the size of an Eisenhower silver U>S> dollar. Front has raised engraving of Freiherr vom und zum Kari Stein, back has raised engraving of a rearring stallion. Coin is from the Province of Westphalla ( in Prussia). Anyone have knowledge of this coin or know how to find its worth? I,m lost.
