100 Francs

Montald was primarily a painter and muralist — designing banknotes was outside his usual practice, and the commission reflects the National Bank's deliberate turn toward fine arts figures in this period rather than in-house commercial designers. Biet, by contrast, was a prolific intaglio engraver working across Belgian state printing jobs throughout the late nineteenth and early twentieth centuries.

Pick 71 spans a four-year issue window, and dates within that range can affect collector interest considerably — the final 1913 issues preceded the German occupation by less than a year.