Yep, pretty sure it's legit. I remember talk about this study model years ago, but never thought I'd actually see it. Thanks for posting this!
As for its design...kinda looks more like a Klingon guitar than a ship
Also, I'm kinda wondering what the ship's proper orientation is supposed to be. The bridge tower and smaller structure are reversed in location in relation to the D7 and K'T'Inga, so I wonder if the bridge is supposed to be at the rear of the ship and the wings in the front?
If he hasn't seen this already, you might want to let Maurice know. He is in contact with Bill George, and would be able to verify if this is indeed the Kronos One study. But really, why wouldn't it be?