Watch List notes:

BRITISH COINS, Charles I, Silver Halfcrown, Tower Mint, type 3b, King on horseback left with upright sword and flowing scarf, initial mark bell (1634-1635), stop either side, rev quartered shield of arms, plume above, 14.59g (Bull 226b/27; Brooker 322; N 2210; S 2774). Weak in parts, lightly toned, good face on King and horse, bold very fine and rare.
This combination of Bull dies not recorded together in his publication.

Estimate: £500-700