Watch List notes:

Mint Error - Mis-Strike Decimal Fifty Pence struck on an incorrect flan 21.5mm in bronze. Obverse: Machin bust of the Queen to right the date off flan of the legend, only ELIZABETH II remains on the flan. Reverse: Most of Britannia, to left, with the lion missing the front of the nose. Only FIF remains of the legend, the remainder off the flan, About EF with traces of lustre, an extremely striking error

Estimate: 50-100 GBP