I'm too lazy to walk ALL THE WAY out to the garage to see the part number. But recall when I looked it up trying to figure out what it was there was very little info about it. IIRC, when I first got the bike, Duck had said he thought it was an 1100 seat.
I still have the tray on my K75 and it is useable. But there''s no cover and it has clearly seen an exacto knife at some point to fit it.
But my point is there are a lot of aftermarket, shaved, cobbled seats out there on K bikes after all these years. If you're a shorty like me, you don't necessarily need a Low seat bike to be comfortable.
Honestly, I keep toying with the idea of getting a regular K75 seat because I wouldn't mind a bit more room. But this one is pretty darn comfy.