This is a rare copper-colored version 501, which I found from ebay, Austria. The tank reads "Made in Germany," and it should be a product of Austria's occupation by Nazi Germany. Made in Germany Fabriqué en Allemagne （French？） This is how it looks when I get it The surface also retained the anti-oxidant coating sprayed on the factory Dismantling and cleaning, and rust removal of iron parts The glass ball has a crack, but it should be pristine After assembly, I used kerosene for a test run, but the results were not good. There were many yellow flames around the veil. I quickly realized that it might be an alcohol nozzle. Next I measured the diameter of the nozzle, which is about 0.28mm, which is the same as the alcohol nozzle of radius 119. I emptied the kerosene in the oil tank, re-added anhydrous ethanol, and made air restriction on the air inlet. This time I succeeded and the flame status was perfect. The top of the lantern is flat and has three protrusions on the top, which is perfect for placing the teapot on top. There are two sets of numbers 03 and 4 at the bottom. It may be helpful for judging the production date. I read the other 501 CPL posts. It may be produced in March 1934 or March 1944. I think 1944 may be correct, please let me know if anyone knows the exact answer, or I can post your thoughts, I would greatly appreciate it!