Antique ArmillaryAn armillary sphere (variations are known as spherical astrolabe, armilla, or armil) is a model of the celestial sphere.
Usually a ball representing the Earth or, later, the Sun is placed in its center. It is used to demonstrate the motion of the stars around the Earth. Before the advent of the European telescope in the 17th century, the armillary sphere was the prime instrument of all astronomers in determining celestial positions.
"We are dealing in bulk quantity."