The Seal and Coat of Arms engraver Jacob Leer was appointed in 1659 as die cutter for the Cologne Circle, Germany. In May
1680 Jacob Leer was admonished by the Lower Rhine-Westphalia Circle for cutting dies for the Cologne Archbishopric Mintmaster
in Dorsten without permission. Leer was most likely the die cutter for an Archbishopric of Cologne 1693 gulden because of
the similarity with the workmanship on a ducat that he cut. Noted by Scheffler as Jacobus Leher with the alternative names
Leer, Lyher and Lier. Lit.: Alfred Noss, Die Münzen der Städte Köln und Neuss: 1474-1794 (1926) pp. 47-49, 240, 286; Wolfgang
Scheffler, Goldschmiede Rheinland-Westfalens - Aachen - Köln (1973) n. 1486 p. 527.