This listing is for The Britannia 2013 The Royal Birth UK 5 Pound Silver Proof Coin! Issued By: The Royal Mint. Weight: 28.28 grams. No nicks or scratches. Includes: Commemorative display box, outer box and COA. Southern California Coin & Stamps 7635 Firestone Blvd. Track Page Views With. Auctiva’s FREE Counter.