Apple IIc (http://www.ebay.com/itm/371252948286) - It could be several different switches [...]
This particular one is amber Alps (clicky, stiffer and much more tactile than blue Alps but equally smooth from the same era).
http://www.ebay.com/itm/371250602155 – terrible Apple switches
http://www.ebay.com/itm/221670767050 – also terrible Apple switches
http://www.ebay.com/itm/181658004001 – also amber Alps (as can obviously be seen as some caps are missing)
Unfortunately, bad-condition //c keyboards with amber Alps switches tend to have very unpleasantly scratchy switches. The two I bought (which looked pretty similar to these two from the outside) were the worst condition Alps switches I’ve ever tried, and even after taking the switches apart, blasting them with compressed air, giving them a detergent soak, and adding Krytox lube, they were still very scratchy :/. I’m curious whether an ultrasonic cleaner would do a better job getting such switches back into decent shape. Alternately it might help to carefully swab out each top housing with a q-tip.
http://www.ebay.com/itm/361206672602 – I also have no idea, but I’ve also seen similar keycaps on MX switches.