Ismay Doto decorative incandescent lamp from the 1930s

I purchased this amazing lamp recently off of Ebay for just 10 pounds, it is excellent condition along with its box. It came with the Duofil lamp shown earlier. This lamp just screams 1930s glamour and art-deco style. The lamp also has 2 filaments which can be switched by rotating the collar on the base. However, this seemed stiff with age so I did not risk trying out the second filament. Also note the amusing box art!