Okay, picked it up today. It is a Series 1. Overall, it's easily 9 of 10 condition. As stated earlier, the reverb doesn't work but that doesn't bother me because I don't use reverb. The footswitch has typical wear from use, which doesn't bother me either because it works fine. The speaker was changed to a Celestion G12K-100. Not sure if that's a plus or minus. The clean channel can get super bright, but overall I like it a lot and plan to use it primarily with my Fulldrive 2 and OCD for the dirt. The lead channel I'll have to work with. I haven't gotten it where I want it yet, but I haven't even looked at the owners manual and I know how interactive Mesas are.
This purchase was to give me an extra amp outside my normal practice space and for $425, I'm pretty dang happy.