They have old two-prong electrical wiring. One has a push button on/off switch, the other has the twist switch.Each lamp weighs SIX POUNDS! I was told these are cluster gears, made of steel. A magnet sticks to it very strongly. They are a copper color. There are some light surface scratches, see photos. Bottom gear diameter is 4. Next gear up is about 3.5", then 2.5" and the top one is about 2. Height is about 9.5.
Each lamp has a sticker that says: C. I do not know what the CTC is. The NPG is New Process Gear.
Packed well with plenty of bubble wrap. International Buyers - Please Note. This item is in the category "Collectibles\Vintage, Retro, Mid-Century\1940s". The seller is "grapevinelady" and is located in this country: US. This item can be shipped worldwide.