France
Charles X gold 40 Francs 1830-A AU55 PCGS, Paris mint, KM721.1. A lightly circulated example could truly not come much better, as this piece retains everything that a collector could desire, including nearly full detail and clean, still-lustrous surfaces with a pleasing "aura" concentrated around the legends.
HID02901242017
Estimate: 400-500 USD