If you email it to Circle Y, someone will answer you. May take several days.
I don't know any that start with S. Could it be a 3? 1 is top of the line, 2 is mid, and 3 is the budget line.
Some info here: Untitled Page
and here Looking for any infomation on my Circle Y Saddle - Have Picture & # - Horse Forums (HGS)
Post a pic of the saddle, side view, and one head-on that will show how wide the gullet is.
Park and Trail would be a 3 model
This is a Circle Y SQHB tree for certain.