Yeah, I'll have to wait for it to arrive because Google isn't helping any.
I can find pics of Thai and Malaysian builds of keyboards that look very similar with PS/2 instead of AT connections... But they really seem different in terms of build quality, and the stickers on the back are completely different.
At this point I'm betting on rubber domes. However, it's only $15 shipped, and it's an interesting looking well built board from Taiwan circa 1988 new in box, so there's a lot of positives there. Even if it's the dreaded dome.