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Archivo:17th Century Spanish Treasure Silver 8 Reales Cob Coin.jpg - Wikipedia, la enciclopedia libre
Treasure Coin Denominations and Size Reference – Walker Christopher.com
INTRODUCING THE COB, 1572-1734 Coin Details - THE HiISTORY OF SPANISH COLONIAL COINS IN THE NEW WORLD
Articles: How to Judge the Worth of a Cob- Daniel Frank Sedwick, LLC. Specialists in the colonial coinage of Spanish America as well as shipwreck coins