20 Francs

Louis Titz designed several note series for the Banque Nationale during the late nineteenth and early twentieth centuries, and Édouard Biet's engraving work — primarily based in Paris — appeared on Belgian issues through plate arrangements that were common practice among European central banks of the period. The combination here is reasonably accomplished for its time, though the series is not among the more technically ambitious commissions either man undertook.

The 1910–1920 date range spans the German occupation of Belgium, during which the Banque Nationale continued operating under severe constraints. Notes issued after August 1914 circulated in an occupied country where the occupying authority was simultaneously pressuring Belgian financial institutions and issuing its own competing paper.