Spiegel Grove Medallions were created to commemorate the sinking of the USS Spiegel Grove as an artificial reef and used as a permit for diving throughout the year. Funding helped to statisfy the debt for the sinking of the ship and they are now sought after by collectors. This 11 pack medallions are difficult to find due to their limited release and the passage of time since their creation. However, the History of Diving Museum holds a collection of these unique pieces and the sale of them are donations to help our nonprofit and educatioanl outreach.