1657 Spanish Colonial Silver 8 Reales Cob. Beginning in 1652, an attempt to restore the quality of cob coins involved a fundamental design change for issues of the Viceroyalty of Peru: the pillars and waves type replaced the older shield design. Weight is 27.6 grams. If you are unsatisfied, or you think its not authentic than you can return in 30 days.The item "1657 Spanish Colonial Silver 8 Reales Cob Coin" is in sale since Sunday, February 2, 2020. This item is in the category "Coins & Paper Money\Coins\ World\South America\Bolivia". The seller is "supermmbb" and is located in Portland, Maine. This item can be shipped to United States, Canada.