1 Ducat - Charles I Harz Mining Ducat

Brunswick-Wolfenbüttel maintained some of the most productive silver mines in the Harz Mountains, but the duchy's gold ducats from this period were typically struck from imported bullion rather than local output — making the "Harz Mining Ducat" designation something of a prestige claim rather than a strict metallurgical one. By 1743, Charles I was actively cultivating an image of industrial patronage, and mining coinage served that purpose neatly.

Müseler's reference corpus for German mining coinage remains the authoritative record for this type. The 31A suffix distinguishes a specific die pairing within the 1743 sequence.