Atocha Fleet, Santa Margarita Shipwreck, 8 Reale Silver Coin, Mint - Mexico, Assayer - D, Date 1621, Coin weight 16.85 grams, Grade 3, Mounted in custom silver bezel with total weight of 20.4 grams, #6153
Obverse, Shield-side (front of coin) - Shield is BIG & BOLD. Denomination "8" and oMD is clear and has great sea washed detail. Looks great work front or back.