1 Mattier - John Christopher of Brambach

Corvey's coinage authority rested on an imperial privilege dating to the medieval period, but by the early 1630s the abbey was operating in desperate circumstances — the Thirty Years' War had brought Swedish and Imperial armies repeatedly through Westphalia, and John Christopher of Brambach's abbacy coincided with some of the worst disruption the region experienced. Small silver issues like this Mattier were struck to keep local exchange functioning when larger denominations were hoarded or simply absent.

The 1631–32 date range aligns almost exactly with the Swedish advance following Breitenfeld.