Silver Crown, 1668. Charles II. Second bust. 
S-3357. Edge not readable in the slab but "VICESIMO." 

CAROLVS II DEI GRATIA, second bust, laureate and draped right
MAG BR FRA ET HIB REX. 16-68, four crowned shields, pairs of interlocked Cs between, around sunburst with cross at centre.

Courtesy Ira & Larry Goldberg Auctioneers, Beverly Hills, CA. www.goldbergcoins.com
Sale 31: The Pre-Long Beach Auction May 30 - June 1, 2005, Lot 2187