Calbeto de Grau, Gabriel, Compendio de Las Piezas de Ocho Reales; Volume I & II, San Juan, Puerto Rico, 1970, Volume I 355 pages, Volume II 378 pages, hardcover with blue decorated cloth binding, text in English and Spanish, Volume One is a comprehensive study of the Eight Reales of Spain, Mexico, Central America, and South America, an index of the rulers of the time period, and a listing of mints in alphabetical order, profusely illustrated, Volume Two is a comprehensive continuation of the mints, and a brief numismatic history of the rulers from Ferdinand and Isabella (1474-1505) to Alfonso XIII (1886-1931), "This set is regarded by many as the definitive guide to eight reales. It catalogs virtually every eight real coin ever minted and is richly illustrated with hundreds of photographs," set of 2 volumes.
Estimate: USD 500 - 700