10 Euros

Issued as part of France's multi-year "Valeurs de la République" series, this 2010 entry from the Monnaie de Paris was struck in a nickel-silver alloy marketed specifically as an "aeronautical alloy" — a compositional choice tied to the coin's aviation-themed program rather than any structural necessity. The Monnaie de Paris has used alloy designations as thematic branding tools across several collector series, a practice that distinguishes presentation from the purely metallurgical decisions driving standard circulation coinage.

KM#1691 is a collector issue with no circulation mandate.