Dumb question....

I just came into posession of a 9 year old BP when someone walked into my work and asked if we could adopt it out. Since my county doesn't allow constrictors, our store wouldn't, so I said I'd take him home and find a home for him myself. I didn't get any info on him...his previous owner didn't seem to know a damned thing about BPs (it was poorly cared for), and was in quite a hurry. Now, I only had one BP before yesterday, but mine has a solid white belly. This one I adopted from him has black bands continuing all over the belly, slightly faded. Is this normal for a normal?