Maxwell Stone, Creative Director said: “This signet ring is likely to be made with Welsh gold, a royal tradition, carrying a weight of approximately 20g.
“Nowadays, signet rings are commonly worn as heirlooms, having been passed down through generations.
“A signet ring like the King’s is likely to retail at approximately £4,000.”
Prince William doesn’t currently wear any jewellery, a palace insider once told the Mirror: “He’s not one for jewellery. He’s never worn any.”