Mintmaster in Mülheim, a city in Germany, in 1555, appointed as Mintmaster in Deutz on 4 August 1558, also continued striking
coins in Mülheim from 1 November 1560. Mintmaster in Neuss, Germany, from 1561 to 1564. He died 14 March 1565. Johan Bitter
was born in Holland; the Mülheim Mintmaster Kaspar Fleming was his father in law. Lit.: Alfred Noss, Die Münzen der Erzbischöfe
von Köln 1547-1794 (1925) pp. 24-25, 46; Alfred Noss, Die Münzen der Städte Köln und Neuss: 1474-1794 (1926) pp. 47-49.