It may be some sort of clone of an eq5 mount Ezy (not sure, what is the weight loading of yours. It looks realtively sturdy ) but you can check out the genuine article here http://www.myastroshop.com.au/products/mounts.asp
Looks very like the mount that Sirius Optics sell with their Orion scopes, called a Skyview Pro. (The mounts I've seen don't have Orion's name on them, but apparently they do in the USA.) I consider it pretty much a clone of an EQ5, but I could be wrong. Sirius to have a motorized version, too, so they might be able to help you.
It's hard to tell stinky as it's not a "genuine" Eq5, whatever that is I have an eq3 and it looks quite different to that, but whether it's an optical illusion of the photos that mount "looks" beefier than mine. Hard to tell.
Ezy, maybe you could take a photo of it with a scope on it so we can get some sort of perspective as to its size.
Yep, going only by the apparent size of it I would guess an eq3 equivalent or 4 at the most. Ok for visual work but a challenge for astrophotography. Might be possible if you get a RA drive, carefully polar aligning using the 8", or a short tube refractor, and piggybacking the camera and manually guiding with a reticle. The short tube, weighing less, would definately be better for this. Fun challenge though.