1 Mariengroschen - Ernest I and Botho

Regenstein was a small, perpetually debt-ridden county wedged into the Harz Mountains, and by 1552 its ruling house was already in a terminal financial slide that would end with the territory absorbed by Brunswick-Wolfenbüttel before the century was out. Ernest I and Botho ruled as co-counts — a joint administration common in fragmented German territories where inheritance customs resisted clean partition. Their coinage is scarce precisely because the county's minting activity was intermittent and low-volume, dependent on whatever silver could be sourced locally from the Harz mining economy.

Schroetter/Deniece 107a distinguishes this variety within what is already a thinly documented series.