This model was originally sculpted by Chris Hess. When brought to the Stone Company, D'Arry Jone Frank helped to refine the mold.
The Sporthorse mold was finished in 1997, and as you can see, on many of the models today, that the original date is still marked underneath the back legs. The first release was a model called Breakaway in 1997. You can view him here: http://www.stonehorseref.com/Horseinfo.aspx?HorseID=10.