2007 Silver Proof English Gateshead Millennium Bridge design. Weight of each coin - 19.00 grams. Diameter of each coin - 22.50 mm. All the coins are made of. 925 Sterling Silver and they all come protected in a plastic capsule.The item "Silver Proof £1 One Pound Set Collection" is in sale since Saturday, December 2, 2017. This item is in the category "Coins\Coins\British\Proof Sets/Coins\2000s". The seller is "yamaha-breakers" and is located in braford, West Yorkshire. This item can be shipped worldwide.