10 Francs Britannia I

At 0.155 g, this is among the smallest gold coins produced for any modern sovereign issuer — a format pioneered largely by the British Royal Mint's fractional Britannia program and subsequently licensed or adapted by several African central banks seeking low-cost entry-level bullion products. Rwanda's National Bank has issued a series of these micro-fractionals under various themes, relying on third-party minting arrangements rather than domestic striking capacity.