That is a Horton Super Sport.
That was purchased the first year the PGC came out with the crossbow permits....early 90's sometime?
It is a 150# pull and was Horton's cadillac bow in it's day.
Not all that fast...I'd guess in the 280 fps category.
You can't really see it in the pictures, and I don't know why Horton stopped making it, but it has a little gizmo that looks like an arrow retainer at the front of the rail...If memory serves me correctly they called it an arrow tuner. The thing worked great and kept the arrow secure on the rail when on stand.
I fabricated one for another antique crossbow (Barnett RC300)
White House moves to ban shredded cheese...Wants to make America grate again.