Charles I. 1625-1649. AR Crown. 43.5 mm, 29.71 g. Group V, Tower mint, Mintmark sun. Struck under the Parliament, 1645-1646. 

CAROLVS D G MAG BRI FRA ET HIB REX, Charles on horseback left, holding reins and raised sword.
CHRISTO AVSPICE REGNO, coat-of-arms.

Seaby 2672; Brooker 275; North 2199.

With permission of cngcoins.com, auction Triton XXII, lot 1420.