1938, Brazil (Republic). Silver 5000 Reis "Aviation Pioneer Santos-Dumont" Mint Year: 1938 Reference: KM-543. Denominations: 5000 Reis – Brazilian inventor aviation pioneer Alberto Santos Dumont Material: Silver (.600) Weight: 10.11gm Diameter: 28mm Alberto Santos-Dumont (Portuguese: [awˈbɛʁtu ˈsɐ̃tuz duˈmõ]; 20 July 1873 – 23 July 1932, usually referred to as simply Santos-Dumont) was ...