I have a MosinNigant carbine that I believe is a vet bring back. It is in rough condition but is all matching. It has no import marks and is not refinished in any way like the imports available at shows, etc.
But the main reason is that on the side of the carbine is what appears to be a service man's name and serial number as follows, to the best of my ability to read.

M/ Sgt. R.M. Mat Phews US 52060366

It is hard to read and the name may be Mathews but there are too many letters,
or it may be Thews? Really hard to make out.
The numbers may be different but I think these are correct.

Anyway, any ideas where I could start looking for this man? I am trying to identify when this may have been brought back, if so. I suppose it could be Korea or VietNam?
Any thoughts?
Thanks,
Brad Foust