Huge 2.25" Two Tone Navy Shellback Challenge Coin
Stunning odd shape design, featuring Neptune and a mermaid on the front side, with Neptune's trident on top protruding from the top of the coin.
The reverse side has a classic Navy ship, full sail with a sea turtle, with the phrases
"Guardians of Heritage" on top, and below;
"Entering Shellback waters" and "Pollywogs Beware!"