It could very well be an AR table, with someone making a new base for it. If there was a picture of the table with the mat off, I could tell. The one give away is the hole for the tonearm. I think there is the old AR suspension below the new custom bass.
However, LordCloud, this is yet another table that has motor problems when it ages. As someone who has owned 3 AR tables, I would turn and run. They are a bitch to work on and there are no real replacement motors for the table, unless you modify the crap out of it like I did with my ARmod.
Wayner