Denier Bracteate

Markdorf was a small lordship on the northern shore of Lake Constance, and its coinage rights derived from the Bishop of Constance rather than any imperial grant. These thin, single-sided bracteates were the dominant small-change format across the Upper Rhine and Lake Constance region through the mid-thirteenth century — struck by hammering a single die into a flan so thin the image transferred to both faces in reverse relief.

Cahn's corpus remains the essential reference for Bodensee bracteates, and Ko#146 is among the more localized attributions in that sequence.