Watch List notes:

COLOGNE (CITY): uniface 4 heller (9.70g), 1788, as KM-440, as Noss-648, uniface white metal reverse, with "64." crudely engraved on blank obverse, approximately quadruple thickness, apparently for use in Cologne Mint display, with 2 die cracks, Choice AU.

Estimate: 40-60 USD