They are definitely old, used cherry clears. Originally these were tactile, but quiet, but the dont age well and the tactile bump wears out with heavy use, especially in working environments.
Can you post a picture of the complete board and the sticker on the back please? That looks interesting. The caps are sourced from SP, so my first guess was this was an Access-IS board, but it would be the first one ive ever seen using clears. Also, I find that font on the caps quite pleasing, let me see the resat of the board^^.