I recieved my second Wyse today (WYSE 840358-01).
My WY60 ASCII 840338-01 had thin DS keycaps throughout the board, but my WYSE 840358-01 had thick DS arrow keys (with the remaining keys on the WYSE 840358-01 being thin DS). I'll post pics later...the WYSE 840358-01 keys are currently getting a retrobrite treatment.