50 Francs Gorilla, anniversary

Rwanda's central bank has issued a long-running series of mountain gorilla coins since the early 2000s, largely aimed at the collector and bullion crossover market. The "anniversary" designation here marks a milestone within that series rather than any event in Rwandan political or monetary history. Mountain gorillas were reduced to fewer than 300 individuals by the mid-1980s before conservation efforts — complicated significantly by the 1994 genocide, which left Volcanoes National Park effectively unguarded for months — reversed the population decline. Current counts exceed 1,000.