Bought an early Optimus 1300 for ok money. It was really dirty on the outside but was surprised how nice it was on the inside. There was no coating at all. The lamp was broken down into parts with proper cleaning and replacement of bad parts. The tank ready for cleaning. a few nuts and some kerosene in the tank. I got out the small coating that was in the tank. Fun with real valves! Here the hat is clean and polished, but between the hat and the top there were gaskets that with great likelihood is asbestos! Got to make new gaskets! Found old lead cable, worked great to make lead gaskets off! The lamp is ready for pressure test. Found a leak in the level glass but must look for suitable gasket material The lamp is finally ready! there was a nice lamp under all the crap! Up on the shelf with the other lights!