Rectangular shaped ingot. Obverse: Port broadside view of the 'Sovereign of the Seas', sail set. Inscription: 'SOVEREIGN OF THE SEAS'. Reverse: Inscription, 'SOVEREIGN OF THE SEAS 1637 The largest most lavishly ornamented warship of her day, the "Sovereign of the Seas" was a symbol of Great Britain's power marking the end of the four-mast era, she represented an important step in the evolution of naval architecture and served as the prototype for English warships for more than 200 years.'