Watch List notes:

World Coins and Tokens, Germany, Brandenburg-Küstrin, 3 groschen, legend reverse (4): Sigismund I, 1534; Albert (2), 1535, 1540; Friedrich, 1588; eagle reverse: Albert, 1542; John the Wise, 1544, generally very fine; others (2), one c/marked, fine (8)
Ex O'Byrne Collection;
Ex Baldwin's vault