From CoinFactsWiki

Royals are known of this type from the Potosi mint but all are rare. The regular cob issues are not nearly as nice. The years 1649-52 were a period of reform at the Potosi mint; it was found that the previous mintmasters in office 1625-48 had been debasing the cobs, a crime for which one official paid with his life. This specimen was lot 1197 in Aureo y Calico sale 232 (Barcelona, March 2011), where it sold for 2,900 € (about $4,785 including buyer's fees). The catalog description^[1] noted,

"Felipe IV (1621-1665). 1656. Potosí. E. 8 reales. Redonda. Tipo 'real'. Muy rara. MBC+. (Philip IV, 1621-65, eight reales of 1656, Potosi mint, royal type. very rare, very fine)."

Recorded mintage: unknown.

Specification: 27.07 g, .931 fine silver, .810 troy oz ASW.

Catalog reference: KM R21, Cal-412.

Sources:

• Harris, Robert P., Pillars & Portraits, San José, CA: Bonanza Press, 1968.
• Krause, Chester L., and Colin R. Bruce II, Standard Catalog of World Coins: Spain, Portugal and the New World, Iola, WI: Krause Publications, 2002.
• ^[1] Sisó, Teresa, Eduardo Domingo and Lluís Salana, Selección de 500 Monedas, Medallas y Billetes, Barcelona: Aureo y Calicó Subastas, 2011.

Link to:

• 1652 8 reales
• 1657 8 reales
• Coins and currency dated 1656
• return to Bolivia