Trojan Warrier Horsemen Molded Fiberglass Wall Sculpture

This large, heavy wall sculpture measures 5'1" long x 21" high.  It has 4 warriors on horses that are painted in a gold color.  The background is black.  There is a name in the bottom right corner:  J. Segura and a copyright symbol in the bottom left corner:  HG(?).  It looks magnificent.  I don't see any chips or damage - just a lot of dust!  I started to research and found this information that may match the item that I have:  Artist - J. Garcia Segura; Bas-Relief Wall Sculpture of molded fiberglass 4 Spartan horsemen soldiers finished in antique copper color.  Is museum catalogued as 'untitled" and identical to one in the collection of the Brown Museum of Art, Jacksonville FL.  I couldn't find a website for the Brown Museum.