Watch List notes:

Charles I (1625-1649), Group I, Halfcrown, 1625-1626, Type 1a³, Tower (under King), King on horseback left, plume on head dress and atop caparison, no ground line, stop to left of m.m., reads MAG BRI : FRA : ET : HI : REX, rev. CHRISTO AVSPICE REGNO, no stops except to left of m.m., square-topped and heavy garnished shield, 13.16g, 5h, m.m. cross calvary (Bull 45a/2 the plate coin [0 Listed; Hawkins 1a³; Francis 1a/1; Brooker 283ff; North 2202; Spink 2766), on a shorter flan, otherwise lightly toned, the obverse good fine albeit slightly doubled / the reverse a bolder very fine, very rare, the sole example recorded by Bull and untraced in commerce since 1970.
Provenance
SCMB, August 1970, no. 4036 - a really good F / VF, scarce - £42.0.0
Estimate: £250 - £350