Bruce Probst
This is a duplicate if scalemates.com/kits/268465-academy-12485-p-51d-mustang

Maciej Bellos
There are two editions of Academy 12485. The one which is a rebox of Academy - Nr. 2132 with just the box changed and a new numbering 12485. The second still holds the same kit numbering and box but has some extra decals for the RAAF. I reckon some local importer in Australia added the extra decals and sold this boxing in Australia without any change in the box numbering.