100 Francs Piedfort

Piedfort coins — struck at twice the normal planchet thickness — have been a Monnaie de Paris specialty since the medieval period, though the modern collector piedfort program was formally revived in the 1970s as a deliberate revenue stream targeting numismatic buyers rather than circulation. The 1989 date places this piece among a run of issues tied to the bicentennial of the French Revolution, one of the most commercially aggressive commemorative programs the Paris mint had undertaken in the modern era.

The .900 silver specification and 30g weight confirm this as a double-thickness striking of the standard 15g circulation-weight flan.