FOR SALE. $425 2011 MEXICAN SILVER LIBERTAD PROOF 5 COIN SET. Includes 1oz, 1/2oz, 1/4oz, 1/10oz, 1/20oz Proof Coins. .999 Pure Silver. Worldwide Mintage of only 1000 Sets. Beautiful Timber Display Box with COA. Stunning Proof Set - Please note from photographs some toning on the 1/20, 1/10 and 1/4 coins - top corners. F2F Brisbane or Express Post with SOD $15.