France
François I gold Écu d'or au soleil ND (1515-47)-L MS63 NGC, Bayonne mint, Fr-347/349, Duplessy-777/775. A lustrous example with few noteworthy marks and evidence of light die work. The obverse and reverse legends are a match for Duplessy-777, except the reverse fields bear two F's and two Lis rather than just four F's.
Estimate: 1500-2000 USD