ANTIQUE MITCHELL VANCE SLAG GLASS HANGING electric light lamp fixture parts. That is hidden behind one of the shields. And the plating shows a little wear through in some areas, i have not found a signature on this lamp but it is very similar to what Mitchell Vance offers in there 1913 catalog #18, see pics, has been rewired and gently cleaned, (you could also order this in silver plate so I guess it could be silver plate), very nice fixture for its age, 36″ tall by 26″ wide.