I have just acquired a steel frame with no manufacturer's transfers (decals), although it does have a Ritchey transfer saying that it is made from Nitanium tubing (which I beleive was a Cro-Mo alloy used on Specialized Rockhopper frames around 1998-9). The serial number appears to be C(two indistinct figures or spaces)09J366.It has rigid front forks of a design used on MTBs rather than road bikes (no separate fork crown).
Can anyone confirm that it is a Specialized, or if it isn't, identify it?