Watch List notes:

Elizabeth II, Proof Crown (Five Pounds), 2011, 'Wedding of the Duke and Duchess of Cambridge', third portrait right, modified legend, rev. WILLIAM AND CATHERINE - 29 APRIL 2011, their heads facing, by Mark Richards, edge plain (S.L22), brilliant FDC, 26,069 issued of a reported mintage limit of 50,000 pieces, in Royal Mint case of issue.

Estimate: £20 - £30