The year here is almost certainly a catalog or transcription error — a "Louis d'or" struck in silver at these specifications points to a modern French restrike or medal issue, likely produced by the Monnaie de Paris as part of their historical reproduction series, not an original Louis XIV gold piece. Original Louis d'or pieces were struck in 22-karat gold beginning in 1640, introduced under Richelieu's monetary reforms to replace the écu d'or and align French coinage more closely with the gold currencies circulating in northern Europe.
The year here is almost certainly a catalog or transcription error — a "Louis d'or" struck in silver at these specifications points to a modern French restrike or medal issue, likely produced by the Monnaie de Paris as part of their historical reproduction series, not an original Louis XIV gold piece. Original Louis d'or pieces were struck in 22-karat gold beginning in 1640, introduced under Richelieu's monetary reforms to replace the écu d'or and align French coinage more closely with the gold currencies circulating in northern Europe.