Looks like Hall Effect?
Those are linear Futaba switches, and are relatively common in Televideo boards.
Parak is correct, of course. Vintage hall effect have 3-4 pins, so it's easier to tell what they are.
Okay: now here's the real question: complicated of simplified? I'm voting complicated, because the long axis of the stem is not in line with the clips (they are in line on the simplified) though most futaba linear complicated switches have black housings.
Vintagecomputermuseum (the seller) isn't keen on lowering their prices, so I don't think a GB is feasible.
Futaba linears are great: the legs are really thick, and with a plate mount they're pretty solidly mounted. They're nice linear switches.