Canute Rex, that is a neat little turnscrew, but I'd hazard that the date on it is totally spurious. Like most things with "1776" on them. I wonder what the little spur to the side was for?
I am drooling over Eric vonAschwege's set of screwdrivers. Those are lifetime heirlooms. I have to guess he referenced the illustration to have them so close in configuration. I never really thought I'd be interested in the beauty of screw drivers.....
God Bless, Marc