Made in the 1940's or 1950's  those were look like Christian Dell who was a designer for Rondella and Blunt in the 1920's and went in the 1930's to work with Kaiser and Idell , some of his creation remained in production until the 1980.  The body  is  metal with some oxidation which bring a nice patina .Purchased in France , it is guaranty an original studio lamp from the 1940's.Stripping the old paint  expose the patina of the steel and different metal , those metal  are usually alloy steel  superior in quality to the recycled metal used in mass produced duplicate and  recent lamp. After being  polished their variation of tone from the mark of use and passing of time create a  warm effect and  a connection to the authentic . 
Size H.16 x D ( reflector ) 6 , rewired , oxidation on the metal .