Odd to have a six-digit number on the right wing...
The "F" may indicate French origin, but I thought we (in the USA) were the only ones with several hundred thousand license numbers issued.
Les McD's original 35 Stiletto had a paint scheme sort of like this one, but I don't recall any silver or gray, or the big lightning jag between wing and tail. Also, every Stiletto I saw or saw photos of had the canopy well forward - jet style. Those were pretty, and so is our mystery model!
MC&HNY