Exhibit Antiques has dated this piece to the 1890s.
The glass balls are solid with central polished bands and outer fields of geometric cut diamonds. Each ball weighs over 1.5kgs.

The brass stands have creatures known as Harpy Chimera or Harpy Term, often referred to simply as a "term" in classical ornamentation. They combine a human female torso with wings, and a single leg that ends in a hoof. The style is rooted in classical and mythological design and became popular in the French Empire style (early 19th century) under Napoleon, when designers drew heavily on Greco-Roman and Egyptian influences. The stands each weight 927 grams.

Originally they would be used as centre pieces on a large table or either side of a fireplace mantle.
Date & Origin
France, c1890
Condition
Excellent, no chips, cracks or restoration. The screws on the understide of the tripod which hold the harpie stands in place are more modern replacements.
Dimensions
Height: 27cm. (including ball)
Diameter Ball: 9.5cm
Exhibit Antiques has dated this piece to the 1890s.
Specialists in 18th & 19th century antique glass
You can view the stock and full dealer information on the Exhibit Antiques Profile Page