US Navy WW2 Dog-tag set 'William F. Wolff'

In a very good condition a US Navy WW2 Dog-tag set on the name of 'William F. Wolff'.
William was a member of the US Navy USS Cossator (AO-77)

USS Cossatot (AO-77) was a United States Navy World War II Type T2-SE-A1 tanker which served as a fleet oiler. Launched as SS Fort Necessity on 28 February 1943 by the Sun Shipbuilding & Dry Dock Co., Chester, Pennsylvania, under a Maritime Commission contract; sponsored by Mrs. W. Taylor; acquired by the Navy on 17 March 1943; and commissioned on 20 April 1943. It was named for a river in Arkansas.