France
Louis XV gold Louis d'or 1724 AU Details (Saltwater Damage) NGC, Paris mint, KM470.1, Gad-339. Boldly detailed with uniform micro-granularity over the surfaces that likely resulted from centuries of salt water exposure. The overall look very likely pedigrees this coin the the Le Chameau shipwreck that was partially recovered off the coast of Nova Scotia in the 1960s.
Estimate: 1000-1500 USD