Overall: 6 3/4 x 5 x 3/8 in. ( 17.1 x 12.7 x 1 cm )
Brass universal ring dial consisting of a graduated circle with a pivoting sighting bar at its center; with suspension ring mounted on top, and a rectangular metal bar with an arrow incised on one side adjoining the base.
Gift of the Half Moon Committee of the Hudson-Fulton Exhibition, 1909
Due to ongoing research, information about this object is subject to change.