3000 Francs Shanghai, white ruthenium

Cameroon has no meaningful numismatic connection to Shanghai — this is a licensed issue produced for the collector market under Cameroon's issuing authority, a practice that became widespread among smaller nations after the 1990s as mints sought new revenue streams from thematic bullion programs. The ruthenium plating, applied over fine silver, is primarily a cosmetic choice to differentiate the piece within a crowded market segment rather than any metallurgical necessity.