Elizabeth I (1558-1603) silver Half Groat. Fifth issue of 1582-1600, sterling fineness. scallop mintmark (used 1584-1586).

(scallop) E D G ROSA SIN SPINA, crowned bust left, two dots behind head.
CIVITAS LONDON, shield of arms quartered by long cross fourchee. 

Seaby 2579.

Courtesy Ira & Larry Goldberg Auctioneers, Beverly Hills, CA. www.goldbergcoins.com
Sale 31: The Pre-Long Beach Auction May 30 - June 1, 2005, Lot 2127