OK, 44-13917 D7-L "You've Had it", of the 503rd FS, 339th FG, flown by Lt Franklin D. Talcott landed at Bulltofta on 6 august 1944. He had suffered an oil leak after being hit by flak.
Intertingly, the pilot was observed wearing anti-G trousers, something new for the Swedish Air Force. After reparations, the aircraft was transferred to Barkaby on 7 oktober 1944.
Lt Talcott unfortunately died that same day, while test flying another interned Mustang, P-51B 43-12463 CS-N "Some Joke" at Ljungbyhed.
after the nose art was removed:
I found more pic, but this a bit of a mystery:
You see the name on the nose, and the checkers that seem to correspond to a 339th aircraft. You even see the place where the cartoon on the nose seems to be painted over.
The rest of the aircraft is all wrong though. It has a black triangle on the tail, and overpainted buzz marks that could be KI-T below the wing, that would point to the 55th FS/20th FG. But why does it not have the piano key markings? The caption says the pic was taken at Bromma in 1947, which would mean the aircraft was part of one of the later batches of P-51's delivered to Sweden. My list of Swedish Mustangs mentions only two former 55th FS Mustangs, 44-72390 (which I believe is still around), and 44-72388 KI-A "Bobby".
It will probably remain a mystery....
I have plans to do a few Swedish Mustangs myself, complete with all the swedish stencils, but that will take a while to finish still...