Vintage brass armillary sundial

Vintage brass armillary sundial

A very unique and hard to find vintage piece, approximately 6" tall. Long pin is removable. Screw on the side is too tight to easily unscrew, but I''m sure with some careful strength it can be done. The only small spot of tarnish is on the bottom left of "XII" on the inside of the curved piece. Could use a bit of a polish around the base. Weighs 6.5 ounces.