10 000 Francs / 2 000 Belgas

The belga was introduced in 1926 as a unit of account equal to five francs, part of the stabilization measures that followed Belgium's severe postwar inflation. Printing this denomination simultaneously in both currencies was a bureaucratic hedge — the belga never fully displaced the franc in public usage, and the dual labeling reflects the uneasy coexistence that persisted until the belga was quietly abandoned after the Second World War.

Poortman and Minguet were among the most accomplished intaglio engravers working for the Belgian school in this period. Montald, primarily known as a Symbolist painter, contributed designs to several high-value Belgian notes of the interwar decades.