Watch List notes:

Charles I (1625-1649), Group I, Halfcrown, 1625, Type 1a², Tower (under King), King on horseback left, plume on head dress and atop caparison, no ground line, stops flank m.m., reads MAG BRI FRA ET HI REX, rev. CHRIS | TO AVS | PICE R | EGNO, square-topped and garnished shield over cross fourchée, 14.73g, 11h, m.m. lis (Bull 14 / 1b-S [2 Listed]; Hawkins 1a²; Francis 1a; Brooker 278/277 same dies; North 2201; Spink 2764), same obverse die as next lot, the reverse die transitional from the type 1a¹, toned, very fine, rare, especially with this die combination.
Provenance
J E Prothero Collection, acquired Spink, July 1991
with ticket, suggesting:
Bt. Seaby, 1960 - very fine - £8.0.0
Estimate: £400 - £600