EL DURO. Study of the Spanish reales de a 8 and coins of equal or approximate value minted in the dominions of the Crown of Spain. Volumes I and II bound in a single volume. Author: Adolfo Herrera. Madrid, 1914. 532 pages + 54 plates. Hardcover with reinforcement on the spine. Weight: 3,10 kg. Almost XF. Est. 70,00.