Watch List notes:

Ten Pounds 2012 The Diamond Jubilee Silver Five Ounce Coin, Elizabeth II enthroned facing 65mm diameter 156.29 grams of .999 silver, Proof FDC in the Royal Mint's presentation box as issued with certificate booklet, only 1,952 issued, apparently the issue price was in the region of £500

Estimate: 200-300 GBP