I sent numerous pictures through someone named Tina at Tommasini for identification. They said it was manufactured between 85 - 87, after that I think they went from SLX to SPX for larger frame sizes. Why do you say its 91 or newer, and do you have some reference you can provide a link to?

I don't see any evidence of cracking in the rim eyelets. Two large wrestling dogs crashed into the bike when it was in the trainer and knocked it out of true, I was able to true it but had problems with uneven tension and it not holding true. I ended up completely detensioning the rim and replacing/lubing the nipples and bringing it back up to tension, and its held true for about 200 miles. Time will tell if its fixed I guess.