A perfect addition to your coin collection or to give as a unique gift! Please take a good look at all the pictures, as they are part of the item’s description. 1988 United Kingdom 5 Oz SILVER Proof Coin. 999 Silver British Royal Mint w/ Box. The 1988 United Kingdom 5 oz Silver Proof Coin from the British Royal Mint is a highly collectible and valuable piece of currency. This coin is made of. 999 fine silver, with a total precious metal content of 5 oz. Its proof strike type ensures a high level of quality and craftsmanship, making it a desirable addition to any coin collection. The coin is from the United Kingdom and comes without certification, making it a rare and sought-after item for collectors and investors alike. Please remember that vintage coins/packaging were loved and cherished by a previous owner and may have some wear or slight imperfections, which should be expected and considered normal for vintage coins/packaging. The image colors may vary slightly from the actual item colors, and variations may occur between different screens. Please review the photos carefully. Please look at all photos and use your judgment on the. Along with what we have described. We appreciate your interest! New items are listed daily. Thank you, Gold & Coin Connextion.