France
Republic bronze Essai "20 Francs" 1851 MS65 Brown NGC, cf. Maz-1377 (R2; in nickel). An intriguing, non-denominated essai, listed by Mazard as a centime, though bearing the semblance of the circulating gold 20 Francs pieces. Splendidly toned somewhere between clay and coppery red, with the reverse fields taking on an almost plumb color. For reference, a similar, uncertified piece achieved just shy of $1100 in Numismatica Genevensis's November 2012 Auction #7 (lot 1598).
From the Engelen Collection of World Coinage
HID02901242017
Estimate: 500-700 USD