Since it is a 1906 AE, it could have been shipped to the US and then found its way back to Europe (possibly a GI personal gun, but not likely since GIs weren't permitted personal weapons unless their name happend to be Patton!
). Years ago an acquaintance of mine came into possession of a really minty early 1900 AE that had a reinforced Swiss extractor and the rear sight was modified to a "U" notch complete with the small Swiss federal cross stamp on the toggle in front of the rear sight. Who knows how many of those early guns made it back and forth across the puddle?