I made this lamp from a 1937 Simplex tank. I spun up a gas cap(have my own lathe) out of some aluminum and then drilled a hole through the center of it to mount the lamp shade post to. I fed the wire out the bottom where the fuel would ordinarily come out. Being a fanatic for originality I did not alter the tank so if need be it could still be used. I used an Edison brand spark plug as a finial to hold the lamp shade in place. I installed a four position touch on/touch off switch so with just a tap I can have the amount of light I want. Everything is hand made.