Authentic Atocha Treasure Coin. An authentic treasure coin or cob from the world famous wreck "Nuestra Senora De Atocha" which sank near Key West in 1622. The coin is an authentic coin from the Atocha, comes with a Certificate of Authenticity from Treasure Salvors, Inc, the company that found the Atocha. The coin is a 8 Reale and is a grade 4. Potosi Mint. 14k gold bezel handmade to perfectly fit this coin.