Colombian Anery (note the lack of the letter U in Colombian)
Colombian Albino (lacking that U again)
Aberrant Colombian (<-----still no U in Colombian no matter how hard I try)
The latter big girl being the only one I don't know for sure is pure Colombian.
Point is, Colombians have circles too. Not all of them, but they are indeed there on many. The circles you find on CA Boa tend to be much more tighter and rounder, where Colombian tend to have a little more length to their circles, because they tend to have less saddles then CA Boa. Same as BCC with Circles, they tend to have even more elongated circles then most, because of their low saddle count.
In my opinion anyway. I ain't that smart though. I'm smart enough to keep myself broke feeding Boas for the last 30 years.
Also IMO, that Boa in the pictures above is a Colombian, or at least part Colombian. Girth, pattern, head markings, tail, and color, all scream Colombian to me.
But that's just a guess not knowing it's history.