Hi Franck,
Nice Find! Thank you!
These photos from 1964 show the result of a Me 262 A-1/U3 being given a fighter nose in the 1940's, perhaps by the Hughes Aircraft Company. The added nose is quite distinctive in these new photos.
Curiously, this source gives the Me 262 A-1a as "White 25" "Connie...":
http://indianamilitary.org/FreemanAAF/Aircraft%20-%20German/FE%204012-Me262A1U3/4012.htm
while this one gives it as "White 30" "Marge":
http://www.ipmsstockholm.org/magazin...tail_me262.htm
best regards,
Jim Geens