UA UniStar mount. It is not the light version, as is definitely the full tube size and thickness of the Deluxe models. In fact, it had the Super 8 dual clamping saddle on it, which is important, and I'll come back to that (it was swapped to another UniStar and I no longer have it). The mount itself shows some wear here and there, but operates just fine. It's not beat up. The little plastic cap on the altitude adjustment is missing (they commonly pop off and go missing). The mounting post, on the other hand, could be in better condition. I believe, but am not certain, that it was a 10mm hole, and that someone might have threaded, or tried to, a 3/8-16 bolt into it. There is a notch in the base, as were in his 10mm posts, and a 3/8-16 bolt does not thread into it. A 10mm threads in and then starts to bind. If I had a 10mm bolt that I didn't care about, I would probably just force it through, as I think it would thread on. If that can't be done, or the threads chased, you could always put any bolt in it you want, with nuts and washers, and then attach it to a tripod and take the head off the mounting post for travel or storage.
Please note that it does not have a saddle, and it does use the saddles that mount with four screws, like the later Deluxe models. However, also please note that the altitude bolt's hex head is not recessed. Apparently, when making them for the dual clamp Super 8 saddles, he sometimes did not recess the bolt head in a machined hole. That saddle would clear the bolt head. All of the single clamp, 4-screw UA saddles I've seen were flat on the back and would not clear this bolt head. So, something to consider. You would either need to incorporate a spacer or find a saddle that works.
It's not complete but the important part, the bones, are great. In fact, note that it even has the attachment holes on the side for an eyepiece tray or DSC computer (if you added encoders), so it is like an early Deluxe (perhaps before he started calling them that). They're no longer being made, and probably related to that, not many have been coming up for sale. REDUCED to $325 obo, PayPal'd and shipped US 48. Keep in mind it's not going to be cheap to ship.