Well, I'm almost certain those are WYSE keycaps. The colour, shape, font, etc. Look dead on, but that can't be a G80-0777, 'cause this keyboard has two keys on either side of the spacebar (instead of 1). (And for other reasons, no LED's on the tenkey, etc.)
Incidentally, that left shift looks replaced to me. On my older WYSE 'boards, the stepp'd shift was actually stepped, and the unstepped ones had stabilizer mounts.
I'm interested in other's opinions as well.