Charles I. Sixpence, 1643. S.2981. Charles I, 1625-49. Oxford mint. 

CAROLVS D G MG BRIT FR ET HI REX, crowned bust left, VI behind head.
DEVS DISSIPENTVR INIMICI EXVRCAT around, RELIG PROT-LEG ANG-LIBER PAR-1643 in four lines, three Shrewsbury plumes above.

Courtesy Ira & Larry Goldberg Auctioneers, Beverly Hills, CA. www.goldbergcoins.com
Sale 31: The Pre-Long Beach Auction May 30 - June 1, 2005, Lot 2167