oh, i actually won this auction last night 
good to hear!
KB is a from a WY-50 and should have the thick keycaps. Don't leave them in the sun or they'll turn yellow.
as far as I know there's not any difference in the legends, but the only stabilized keycap is the spacebar, so that's one way to tell if it has thick or not. I could pull my WYSE keycap box out and check.
I have a case that someone could have if they want to wrap it up and use it
I believe this works with soarer's controller code, so you won't even need the cable.
I used to see a lot more Wyse when I lurked Geekhack in 2013, I think it's fallen out of favor with so many keycap options these days.
I know, me too.
The WY-50 has thick, the WY-60 has a similar layout but has stabilizers (and fulltouch caps) and thin. The Excellent WY-30 also has thin. AFAIK all versions of the WY-85, PCE and "gate array" have thin but I don't have any to check.