I guess what's bothering me is that the body is marked EMIR, and the iron has a makers mark with FWE (we think). If they were made in the same place at the same time, why are they marked so differently? If you found the two separately, you would have no reason to believe that they belonged together. There are several planes out there with that combination of parts, leading us to believe that they were made by the same maker, but is that enough? If you found ten Dodges with Goodyear tires on them, would that be 'proof' enough to say that they were made by the same maker? The metal parts could have come from another maker, much like the Goodyears.
Toby