Aris,
The red-white-red flash is a sign of the 1st Canadian Corps in Italy. However, the scout car you picture appears to have an American ID number. Strange... but it COULD be one of those atttached (or lent to) the Royal Westminster Regiment (the 'Westies') who did use the M-3s in Italy. One of their officers won a VC there in these things.
http://www.victoriacross.net/award.asp?vc=824