For sale are these: Men's World's First 999 Silver Half Sovereign Coin Cufflinks Post are UK hallmarked for 925 sterling silver. Coins are fine 999 silver. Weight: 11.5 grams,total. In very good pre-owned condition. Uncleaned. Please view all photo's as these form part of the description. Check out my other items, as we combine postage. Thanks for looking.