Antique bankers lamp / vintage metal desk table best lamp / Art Nouveau style

Metal desk lamp in a nice old mottled finish in brown and black. In working order, this lamp has a top bar that is can be adjusted and a working hanging on/off chain. Base is marked C246, no other markings that I see.

5.25" x 6.5" base; shade is 8.25" long; about 13" tall in normal positioning, back base post is 12.5" to top screw nut; weighs nearly 4 pounds

In good, preowned, working condition; One side of top holder has an exposed nut which does not appear as an original best side finial nor original socket. Spotting and light discoloration. As Is Final Sale Please review pictures in zoom.