Numismatic Puzzle: Regensburg in Gold

The piece of today’s puzzle comes from the last SINCONA auction:

Germany, City of Regensburg. 10 Ducats n.d. (1742–1745), Regensburg Mint. With title of Charles VII. Extremely rare. Magnificent condition. From auction Sincona 94 (2024), lot 1674. Result: CHF 140,000.

Have fun with the puzzle!