Found a listing on eBay for a keyboard I'd never heard of, a Zentec Cobra. Pretty vintage, looks a lot like the Wang/Keytronic keyboard I got about six months ago. Anyone heard of this brand/model? Is this just a foam-and-foil variant?
Google searches have some results for Zentec linked to Data General, but Zentec also has a series of patents for microprocessors and keyboard data entry. Appears to have a DIN connector, I have an adapter for that already...