Stewart S-Series

I just bought a Stewart S-Series board from a buddy that needed the money, it’s a 7’10" x 20" x 2/78". It has a short board feel and look with a rounded pin tail. I bought it for $150. The board is very clean, no dings, wet spots, nothing. Does anyone know anything about these boards? Did I get ripped off or did I get a good deal? What are the best type of waves for this board, and does anyone know where there is a link or any pics of this board on the web? Thanks for your help Chad