Numismatic Puzzle: Bloody Mary

The piece of today’s puzzle comes from a Künker auction:

Great Britain. Mary, 1553-1558. Gold medal n.d. (around 1554), by J. da Trezzo. Original cast. Extremely rare. Specimen from the Baronin Batsheva von Rothschild Coll. from the possession of Baron Alphonse de Rothschild (1827-1905). Extremely fine. . From Auction Künker 386 (2023), lot 5819. Hammer price: 525,000 euros.

Have fun with the puzzle!