Watch List notes:

Five Pound Crowns Countdown to the London 2012 Olympics a 4-coin set comprising 2009 3-Year Countdown S.4920, 2010 2-Year Countdown S.4921, 2011 1-Year Countdown S.4922, and 2012 Olympics S.4923 Silver Proofs each with a blue Olympic logo in the obverse field nFDC to FDC with a hint of toning, in the long Royal Mint box with certificate

Estimate: 50-100 GBP