Rio 2016 Olympic Games Commemorative Coin Set Complete set of commemorative coins. Extremely rare. Four sets, four coins per set, totaling 16 coins; each coin has a face value of 1 Real, is made of steel-copper bimetallic alloy (two-tone design), weighs 7 grams, and has a diameter of 27 mm. The first Olympic commemorative coins issued in South America and Portuguese-speaking countries; the first set of "bimetallic commemorative coins" in Olympic history; includes commemorative coins for the first time in Olympic history for "golf" and "rugby" (these two events were added to the Rio Olympics).