We think that Jefferson Glass made these pancake french opalescent coin dot lamps in the 1930's. Previously thought they were made by Fenton, but Fenton's chimney is shaped like a pulled tulip -- not the bulbous shape seen here. This one has a rim-chip on the bottom of its chimney, hidden when sitting on its socket. It is 11" tall and about 8" wide at the base. Original wiring (2-prong plug).