10 000 000 Mark Braunkohlenwerke Borna

Braunkohlenwerke Borna AG was a lignite mining operation in the Borna coalfield south of Leipzig — one of the largest brown coal deposits in central Germany. Like hundreds of German industrial firms in mid-1923, it issued its own emergency currency (Notgeld) to pay workers when the Reichsbank simply could not supply enough physical banknotes to meet weekly wage demands during the hyperinflationary collapse. Printing in-house or through a local press was faster than waiting for official currency that would be worth a fraction of its face value within days of delivery.

J. J. Weber was a well-established Leipzig publishing and printing house, which handled a number of regional Notgeld issues during this period. The 10,000,000 Mark denomination places this note firmly in the August–September 1923 window, before the zeros climbed into the billions.