Kelly may know more about this than I do, but in conversations with Jack he stated that there was no difference between his early Jets and the last ones he made, other than the fact that he did make a few with carbon limbs on special order only, and the ones he made as camo models where the riseres were one solid piece of hard rock maple.
He said that he made no design changes in the bow,
Now, if this is true, your bow is every bit the same as one made in new mellinium.
Kelly may shed some light on this,