Bolivia 1770-PTS JR 8 reales
This type was struck in Bolivia 1767-70 and is fairly available in circulated condition. Gilboy lists the 1769 as "normal" and the 1770 as "common." There is an 1770/69 overdate and varieties with or without a dot after CAROLUS.The second specimen shown was lot 201 in Aureo y Calicó sale 232 (Barcelona, March 2011), where it sold for 1,100 euros (about $1,815 including buyer's fees). The catalog description noted,
"1770. Potosí. JR. 8 reales. Columnario. Bellísima. Extraordinaria pátina irisada. Muy rara así. S/C-. (Eight reales of 1770, Potosi mint, pillar type. Very beautiful, extraordinary iridescent patina, very rare thus, about uncirculated.)
Recorded mintage: unknown.
Specification: 27.07 g, .917 fine silver, .798 troy oz ASW.
Catalog reference: KM 50, Gilboy P-8-4, Cal-972.
- Elizondo, Carlos A., Eight Reales and Pesos of the New World, San Antonio, TX: 1968.
- Gilboy, Frank F., The Milled Columnarios of Central and South America: Spanish American Pillar Coinage, 1732 to 1772, Regina, Saskatchewan: Prairie Wind Publishing, 1999.
- Yonaka, Brad, A Variety Guide to the Pillar Coinage of the Guatemala, Bogota, Lima, Potosi, and Santiago Mints, 1752-1771, Long Beach, CA: Agorocu Consulting, 2018.
- Krause, Chester L., and Colin R. Bruce II, Standard Catalog of World Coins: Spain, Portugal and the New World, Iola, WI: Krause Publications, 2002.
-  Sisó, Teresa, Eduardo Domingo and Lluís Lalana, Selección de 500 Monedas, Medallas y Billetes, Barcelona: Aureo y Calicó Subastas, 2011.