Yeah, the 98 was a dark purple Reynolds 525 frame.
Before that they were a blue or purple, and made in USA with Tange tubing.
The yellow 99 and later, are unbranded double butted tubing (or called Voodoo Black Magic or something).
I only mentioned it because you don't want someone thinking they are buying a Reynolds or a US made frame if they're not. But yours is a great frame anyway regardless.