Small Brass Demonstrational Armillary Sphere This armillary sphere is solid brass with a rich antique patina finish that will not tarnish or show fingerprints. The rims of the armillary spheres are marked "A PARIS Chez G. Gobille a P Ache Royalle." The heavy solid brass base is mounted on turned solid hardwood, and the bottom is covered with felt. The Small Brass Demonstrational Armillary Sphere measures 5 inches (12.7 cm) tall,3 1/2 inches (8.9 cm) in diameter, and weighs 12.3 ounces (350 g)