Here's a keyboard, sorta crappy really. But, it has a capacitive Foam'n'Foil switches I haven't seen before.
It's made (or at least FCC'd) by Deyi Technology Co. sometime around 1987.
Seems like BTC clone. Even carries a BTC model number (ala BTC-5339). The sliders are very similar in shape, but it has individual housings where the BTC uses a monolithic mouting surface.
Deyi foam and foil. For a second I thought these were the unique clicky foam and foil variant. Still, interesting find; I've never seen a Bigfoot lookalike with foam and foil switches .