This is an antique Star brass hand or thumb air pump applicator by Thos W. Houchin.
It is black and features a round shape, a ridged design, and an air pump at the top.
This item measures 3" in diameter and 2" tall with the pump being 2" in length.
It was made in the U.S.A.
The pump is in good pre-owned condition with wear from age.