1/48 Tamiya P-51B 3 Squadron (RAAF) Italy late 1944
Decals are from Red Roo, an Australian manufacturer of resin and decals dedicated to Australian subjects (check them out).
The kit is fabled for it's easy building nature and many a modeller has turned to one of these for a mojo kick. I can only agree with this belief, if you have not built one of these go and build one for a relaxing build, though choosing a aircraft scheme is probably the hardest part!
8 additional images. Click to enlarge.