The badge is that of the 21st Independent Parachute Company which was first formed in the UK in June 1942. They were pathfinders, mainly dropped behind enemy lines ahead of larger ground and other Para forces.
Amongst many battle honours, you will find Arnhem where it is documented that many of the members of this company were German mostly Jewish. Thus Germans fought Germans at Arnhem and likely other places.
What struck me when reading of these men, many of whom died in battle, was that most of them apparently were given Scottish or Irish names by the regiment, 'Nommes de Guerre', to protect them should they be captured. They were kitted out with their gear and their new names added, laundry bags, ties etc.
It was fascinating reading about these men, following through I found that Nommes de Guerre was not limited to the Paras, other outfits had used a similar approach including RAF, RCAF and others. It would not be surprising to find that US forces did the same thing and perhaps even the Germans in the Battle of the Bulge, when some posed as US soldiers, made use of the technique.
So, of itself, an most interesting 'find', if you can call it that. But, how does this relate to the Somerton Man?
Many of the German members of the 21st Para's according to the documents, were ex internees, now there's a link to Australia.