Well, the more I look at him he does look a lot like a locale but to say for certain that it's a Suri or Guyana without having a definite breeder is never going to be possible.

You also can't rule out the other BCC's. Peruvian's, Brazilian's, Venezuelan's..

Suriname & Guyana are not the only BCC there are and they can look similar.

It is a beautiful little snake whatever he is.