The C= key keyboards have individual keyswitches.
It's not like the common Mitsumi stuff that had springs vs rubber cups.
I have a C= key keyboard for both the A500 and the A2000.. Very nice feeling, in my opinion better than the rubber cup Mitsumis that most big box Amigas shipped with. :-)
Those A2000A keyboards with red Amiga keys were made by Cherry, if my memory hasn't totally forsaken me. Can't remember the manufacturer of the C= key keyboards, though.. Some three letter acronym, I think it was. :-)