Absolutely terrific colonial American corkscrew. Business end is very magnetic hand forged iron. In general design it is crude but it has some very attractive ridges and rings and a nice central bulge which is very nicely beveled. Certainly made by a blacksmith with some skill. The handle is hollowed bone with some groove work on the sides and to a lesser degree in the center. A minor degree of chipping on the edges but nothing disfiguring or even unexpected in a piece with this age. One side has what looks like it may be some small spots of leather residue (See images). Just a lovely, colonial piece. The work to me absolutely looks to be mid to late 18th century, or right around the American Revolution. I am also more then confident with calling it American as British (Or any other European culture) would certainly use ivory or something more high end then bone. Just a lovely piece that speaks volumes.