Made in France in the late 1950's  this desk  lamp is most likely a design from Adnet , regional company used to order part and design to reassembled them for their own label  ,original  brass and metal .It is the last time in France that it was possible to produce  and offer brass pieces of this quality , the mass production of the 1960's was  just around the corner and turned the page on small atelier to open the age of  cost saving . The pieces are glass not plastic ( like  in more recent  repro) with brass fitting .Lampshade not included just for reference.
Rewired , size H.11 to the socket , base 4 x 4