Thanks for the info, Gentlemen!
I've shot it twice now, and so far I'm extremely impressed. It may be my most natural "pointer"... it just seems to put an arrow where I am looking, no muss, no fuss.
Its pretty too, with black locust limbs, and a Purple Heart and Wenge riser, divided with a thin strip of Osage Orange. The gentleman I acquired it from was a real class act, too, which is always nice to find.
I've found references to a few Sentman models after I typed in Razorback and Moosejaw, so thanks guys! Its hard to tell, as there aren't many pictures out there, but He had older models called the Competitor, Icon, and Deluxe apparently. I'm thinking it might be one of those. The evolution of his design would be interesting. Now I want a Moosejaw, LOL!