Watch List notes:

BRITISH COINS, Charles I, Silver Halfcrown, 1644, Bristol mint, the King on horseback left, Bristol plumelet behind, BR monogram below struck over inverted BR, no groundline, initial mark small plumelet, inner and outer beaded circle and legend surrounding both sides, rev Declaration in two lines, three Bristol plumes above, date and BR monogram below, no initial mark, 13.49g (Bull 643/6c; Brooker 985; N 2492; S 3010). Toned with a patina from the River Thames mud, double struck, very fine, a rare reverse die with the BR overstrike.

Estimate: £800-1000