FYI some of these did have Blue ALPS but no matter, they had white alps that are equivalent to blues in quality.
Note how that Omnikey has no trap door on the front where the logo is. Rather than a bank of dip switches under that trap door, they are on the back edge of the keyboard. This means this is a 1992 or older board and they basically all had good ALPS whether white or blue they were the older style rumored to be made in Japan before the ALPS factory moved production to China (or was it Taiwan, I forget now)
I've never typed on a an Omnikey that was pre-trapdoor (1992 and earlier) that wasn't incredible, unless it was abused or sat somewhere and got oxidized in the switches.