Looks good with the kangaroos. I've had those decals since the early 1980s. All that time, lying quietly in an old cigarette box (with charming, Art Deco gypsy on it - not a blank box as the Aussies now have to suffer), just waiting for the day when they would adorn an M13/40.
This is a good bit of kit from Italeri - recommended.
If you are wondering about the grey-green finish, it's ok, the Italians did send kit finished in this 'Metropolitan' colour to North Africa:
The top illustration is from Nicola Pignato, Italian Armored Vehicles of World War Two (Squadron/Signal Publications, Carrollton, 2004), and shows an M13/40 destroyed by the Greeks on 19th March 1941. The photograph is from Pignato's Italian Medium Tanks in Action (Squadron/Signal Publications, Carrollton, 2001) and shows one of the Aussie prizes, but after it was abandoned and retaken by the Italians. Or perhaps the Aussies just didn't want it any more.