I sold this guitar 10 years ago, only to realize later it sounded and played better than any modern ES-335 I've owned, which included regular run, Custom Shop, and Historic 335s. I had a chance to get it back, so I could not pass it up!
According to Gibson(copy of e-mail from Gibson included with guitar), this guitar is a 1998 Custom ordered Historic Reissue 1959 ES-335 model with serial # A98xxx, before Gibson issued COAs(which started in 2001). I originally bought it from a jazz guitarist in San Francisco back in 1999.
What made it a Custom order was that it was ordered left-handed and was specified to have a light vintage sunburst instead of the true vintage sunburst. This allows you to see the figured top all around the perimeter of the guitar, which is something I have not seen in other 335s.