Note: Wyse calls this the DEC VT-420 Layout because of the bottom left 4 keys.
[ Made to work on ]
Wyse WY-520 Series
Wyse WY-285 Series
Wyse WY-185 Series
Also should work on (we tested it):
Wyse WY-150
Wyse WY-160
Wyse WY-55
Wyse WY-65
Wyse WY-325
Wyse WY-355
Wyse WY-370
Wyse WY-GPT
May work on many more as well like: Qume and Link.
[ Part Numbers ]
On Keyboard Back: 841018-04
Single Box Distributor P/N: 901988-04
10-PAK Distributor P/N: 900987-04
[ Type of Key Switch ]
Cherry, Black, Mechanical key switch.