50 Francs

Belgium's first genuinely stable paper franc series after the monetary chaos of the early industrial decades, these notes were issued under the Latin Monetary Union framework that bound Belgium, France, Switzerland, and Italy to a shared bimetallic standard. The Banque Nationale had been established in 1850 specifically to provide a reliable paper currency, and by the mid-1870s this denomination was doing serious commercial work — not pocket change.

Cotton rag stock was standard for the period, but the watermark security on this series was notably primitive compared to what contemporaries like the Banque de France were deploying. Surviving examples are uncommon; most notes from active circulation in this era were redeemed and pulped well before any collecting market existed to preserve them.