Charles I (1625-49) AR Shilling (1643-44). S-2843. Tower Mint issue, under Parliament (1642-48). "P" in brackets mm 

CAROLVS . D G MAG BRI FRA ET HIB REX . [P], crowned bust left, XII behind.
CHRISTO . AVSPEX . REGNO, coat of arms divided by cross fourchee.

Seaby 2843

Courtesy Ira & Larry Goldberg Auctioneers, Beverly Hills, CA. www.goldbergcoins.com
Sale 31: The Pre-Long Beach Auction May 30 - June 1, 2005, Lot 2161