As I recall, S Works started in '93. I had a '93 S Works Steel frame and fork, in a deep, dark green. The S Works Carbon was the refinement of the Stumpjumper Epic Ultimate, which Ned Overend rode in '92 and '93.
Many sources quote different dates, including Specialized... I think yours is a '94, going by color. Those XTR M900 components sure were smooth!