Brazil 1851 20000 reis KM-461
This date, known as the ruffed bust of 1849-51, was replaced by the bearded type of 1851-53 (KM 463).
Recorded mintage: 303,000 (including KM 463).
Specification: 17.93 g, .917 fine gold, .528 troy oz.
Catalog reference: KM 461.
- Friedberg, Arthur L. and Ira S. Friedberg, Gold Coins of the World, From Ancient Times to the Present, 7th ed., Clifton, NJ: Coin and Currency Institute, 2003.
- Cuhaj, George S., and Thomas Michael, Standard Catalog of World Coins, 1801-1900, 7th ed., Iola, WI: Krause Publications, 2012.
- Pimentel, Alvaro Mendes, Catálogo de Moedas Brasileiras de 1643 a 1962, 9a Ed., Rio de Janeiro, 1962.
- Amato, Claudio, Irlei S. Neves and Arnaldo Russo, Livro das Moedas do Brasil, 12a ed. Sao Paulo, 2008.