Sorry, I can't help with the serial number. The Reparto Course frames use a different and apparently inconsistent serial number format. That, plus we don't see enough of them to properly analyze what data we do have.

I am going to go out on a limb and suggest that the fork may not be original. The decal on the blade appears to have a blue border as opposed to red. If so, this suggests a replacement fork. TSX decals have a red border. SL, SLX and TSX all used the same fork blades, so there's no reason for the different decal except for a replacement fork or the wrong decal being applied at the factory. Of the two cases, the former seems more likely.