Now that I look at it again, it seems to be some sort of ALPS kind of situation. In the late 1980's, ALPS moved their keyboard production to Taiwan, and many old Unitek keyboards had ALPS switches.
But I would be cautious with this auction. The picture's kind of fuzzy, and the keyboard's most likely filthy, smokey, and damaged (Like another ALPS keyboard we got from RNS Auctions with a similar-quality picture). Alps switches also don't wear all that well either so there could be some bad keyswitches as well.