20 Francs Crotalus

The "Crotalus" designation refers to the rattlesnake genus, and this issue belongs to a broader series of Congolese wildlife-themed bullion-adjacent coins that have proliferated since the 2010s — produced primarily for the collector and novelty market rather than any domestic circulation purpose. The Democratic Republic of Congo has become one of the more prolific issuers of such licensed numismatic products, with the actual minting typically contracted to European facilities.

KM#309 places this firmly within a crowded catalogue of DRC silver issues sharing nearly identical specifications with dozens of contemporaneous types.