Not a common distinctive unit insignia to find. 76th Infantry Division unit.
417th Infantry Regiment DUI. This unit served with the 76th Infantry Division in the ETO. The figure on the shield is Nathan Hale of Revolutionary War fame.
Screw back, hallmarked ROBBINS, Attleboro, Mass.
Very good – fine with a couple of tiny chips. The blue is more of a medium, rather than light blue.