20 Francs Piedfort

Piéforts — struck at double or greater thickness on standard dies — were produced by the Monnaie de Paris primarily as presentation pieces and archival specimens rather than for any circulation purpose. The 1929 date falls within the interwar stabilization of the franc under the Poincaré reforms of 1926–28, when France returned to a de facto gold standard after the catastrophic depreciation of the early 1920s. That monetary reorganization prompted fresh coinage production, and piéforts of this period were typically retained by the mint's own archives or distributed to official recipients.

Surviving examples are genuinely rare. The .680 fine silver alloy is identical to the circulation strikes.