50 Francs - type 1870 Clermont-Ferrand

The "Clermont-Ferrand" designation tells the story. When Prussian forces advanced on Paris in the autumn of 1870, the Banque de France relocated critical printing operations to Clermont-Ferrand in the Auvergne — one of several provincial emergency arrangements that kept French paper currency functioning during the siege. This 50 Francs type was produced under those conditions, making it a direct artifact of the Franco-Prussian War's disruption to central banking infrastructure.

Pannemaker was a distinguished Brussels-born engraver whose work appears across multiple European issuing authorities of the period. His presence on both faces of this note is notable; split engraving responsibilities between obverse and reverse were common, sole attribution on both sides less so.