I think he's got a lot of that breed in him, but the chances of him being only one breed are remote. And without papers I guess it really doesn't matter. You got a beautiful, handsome boy no matter what he is!
That's what I would call him, Lynx Point Siamese, although technically since he has no official pedigree he is a lynx point domestic shorthair -- nevertheless, the term "Siamese" is used intercheangably with colorpoint (as in Siamese rabbits). BTW his stripes and spots and even body color will get darker with age. My daughter has one that used to look like him and now at age 10 is much darker all over but very striking and beautiful..