From his book " Always Another Adventure " Robert Marx says they retrieved a total of 12 coins; 2 brass Maravedis spanish coins, 2 silver coins, 3 silver Spanish coins, 2 gold Spanish coins and 3 silver Spanish coins. The complete haul is described on page 212 in his book. It was mostly trinkets. But there were 4 large metal chests that were never recovered and only seen once by Marx himself. If you've ever been over there you know how rough the water usually is, particularly the closer you get to shore. According to Marx, the Matanzeros was around 100 yards from shore.
Years ago I dove on the wreck of a Spanish Nau located on the North East coast of Cozumel in 19 feet of water.We were probably 150 yards or so from shore. The current and constant back and forth tidal action gave us all a case of the queasies. There were 9 cannons lying on the sand and stuck in coral heads. They were 8 to 10 feet long. We found 2 cannon balls, some charred pieces of wood and one silver Real coin. Looked like a piece of 4 to me. It was very tarnished. When we got back on the boat, Felipe cleaned it up and there was the date 1720. The coin looked to be in excellent shape.