I've had this for a couple of years so decided it was time to give it a little clean. It wasn't bad anyway and if I'm honest I don't think it's been used much. Looking at the colour of the brass under the tank and on the base of the frame it's got that never polished look. Also my existing E41, also from 1942. I also found that the vapouriser has the original red washer, so that has stayed where it was.