I have:
four Jets ... 57, 56 (Camo) 54 (Black and Black) 49.
one Carbon Classic (51)
three Original GameMasters (51, 53, 55)
One Jack Howard Hunter (Howatt Hunter finished by Jack)
and one very rare and elusive "Jack Howard Supreme Target" My personal "Eldorado boe". We don't know how many were made, but only two are known to exist. These only surfaced in the last few years.
It should be noted that the Camo model Jets were made from one solid piece of hardrock maple. Unexpectedly these bows are faster than the rosewood models. Jack felt that if he was going to paint the bow camo there was no sense in using the more exotic rosewood he had in stock. Especially since there was then an embargo on importing the rosewood. Knowing this was coming, he had ordered a huge supply of rosewood so he would have enough to last a long time. He determined that the solid Maple riser was more rigid than the laminated rosewood risers. This resulted in a higher speed. My 56# Camo cronies about 10 FPS faster than my rosewood 57# However, there were a few rosewood risers that were camo painted before he started using the hardrock maple.
The Howatt Hunters were made in response to customer request that he come out with a 62" model. He did not want to retool for this so he ordered about 50 unfinished Hunter models from Damon Howatt and refinished them with his special finis and logos. Hence the "Jack Howard hunter". Now these bows did not have his unique limb design with spine matched laminations. They are basically Damon Howat Hunters with Jacks Logo and finish. Although they are not Jacks special limb design, the Howatt Hunters are no slouch bows. They are great in their own right.
Keep an eye on e*at. The Jets pop up every once in a while, but be prepared to pay premium for them. Worth every penny.
If you are lucky enough to acquire one, know that these bows were designed to be used a special string that Jack manufactured himself. Unlike B50, it actually stretches. Strings in this material are still available from a member that posted in this thread. I will leave him to acknowledge who he is and if he will provide you with them.
The lengths of Jacks bows are as follows.
Hunters 62"
Classics 64"
Gamemasters and Jets 66"
Supreme Target 68"
Hope this info has helped a bit. If Kelly Peterson ever chimes in he will have lots more info.
Jack Millet