1 franc - Chambre de Commerce de Bayonne 64

French chambers of commerce were authorized to issue emergency fractional notes during and after the First World War to compensate for the near-total disappearance of small coinage from circulation — silver and copper had been hoarded or melted almost immediately after mobilization in 1914. Bayonne's chamber was among dozens across France that exercised this right, producing locally administered scrip that filled the gap until the national coinage supply recovered in the early 1920s.

The JP references 21-64 and 21-65 indicate two distinct typographic variants within this 1 franc emission, a distinction that matters more to specialist collectors than the notes themselves suggest at first glance.