I received this Optimus 200 P brass version today. I have started to disassemble it already since I have a few days vacation left, so now the parts will be cleaned and polished. I sold one of my two Optimus 1200 and got good money for it so i now bought this lantern to extend my collection. After having studied other posts in this forum I believe it is a mid 60s lantern. Here are som pictures of it. Will update later with the progress and when I have it in running condition.