The high scale count and pattern, and probable locality. If you look at a Retic, the pattern has large pale areas along the dorsal line. This pattern looks like a boa, though not the most common type.
The colour being distorted and the glare in the picture make it difficult for me to make the pattern out very well, but it doesn't look like a Retic to me. It doesn't look like a Boa constrictor (constrictor constrictor or constrictor imperator) to me, it looks like one of the South American boa species with a more busy pattern, but I really can't make it out very clearly. Looking at the tail would make it very easy to see if it's a Boa constrictor (either subspecies), but it doesn't appear to be anyway. I'm pretty sure if I was able to hold the skin I could work it out.
), rather than geometric. Here are some close-ups - apparently the skin is a bit shiny, so I'm not sure it's any better! Apparently this is only the tail section. The other section was made into a handbag for my great-grandmother!
