Charles IX died in May 1574, which makes a coin struck in his name in 1575 an anomaly requiring explanation. This is a posthumous issue, authorized under Henri III, who continued striking in his predecessor's name while the new royal coinage was being prepared — a transitional measure not uncommon in sixteenth-century French minting practice but easily misread as a dating error.
Charles IX died in May 1574, which makes a coin struck in his name in 1575 an anomaly requiring explanation. This is a posthumous issue, authorized under Henri III, who continued striking in his predecessor's name while the new royal coinage was being prepared — a transitional measure not uncommon in sixteenth-century French minting practice but easily misread as a dating error.