unfortunately if they are unbanded you will not be able to tell very easily. If you bought them from a store, I dont know what to tell you. If you bought them online, then chances are what you have is what you ordered. I inquired with Christian Eiroa of Camacho and he said they only ones that really ever came unbanded for a short few week period of time were the naturals so chanves are that is what you have.
Best way to tell is to smoke it. If draws 3-7 and very very edgy you have a natural. Also before lighting it put it in your mouth for a a minute. If it is sweeter then it is maduro, if it almost stings a little and you kind of get the "pins and needles" feeling on your lips, it is natural. These are traits that I have noted for both wrappers of this particular line but everyone tastes thing differently so this might be harder to tell..