I just received the engine and frame numbers from Damon Dardaris from the USA and found out that his engine number matches the frame from Richard White from England being WM20 81813. It's not very likely that these will end up together again, but it's an other nice discovery.
Yeah that would be really nice to find, your own bike in a WWII photo. I have quite a few WWII photo with the tank number clearly visible but I didn't calculate them back to the frame numbers (yet).