macguy80: Your description sounds like model A2S4100, with amber Alps switches. When in good condition (rare for an Apple //c, as the keyboard doesn’t have any cover and were often sitting open to the elements for decades; a good condition //c where the computer works goes for several hundred dollars still on ebay), they’re really lovely switches. It might also be an A2S4500 with orange Alps switches: those are also very nice to type on, and make plenty of sound when they bottom out. The earlier //c model A2S4000 used the Apple “hairpin” switches.
The color of the whole computer’s case was originally the same “platinum gray” color as the keycaps (and I suspect earlier A2S4000 machines were also of similar color originally, though most pictures I’ve seen are quite yellowed), but the Alps-made keycaps and any other still-gray parts are made out of PBT plastic, while the yellowed parts are made from ABS plastic.
If you want to remove a keycap to see the switch underneath, take a pair of butter knives (these are generally smooth and won’t scratch your keycaps), slide their tips under opposite sides of the keycap, and gently pry upward. In my opinion butter knives are more effective than any purpose-built keycap puller, though they can be a bit unwieldy.
