France
Republic nickel Essai "Franc" 1851 AU Details (Cleaned) NGC, Maz-1379 (R2). Lightly hairlined, but visually still quite impressive, with a light champagne tinge to the surfaces still revealing itself when the coin in rotated in hand. Listed in Mazard as a centime bearing the semblance of contemporary circulating Franc coins.
From the Engelen Collection of World Coinage
HID02901242017
Estimate: 400-600 USD