I'd say it looks like a Thirty
On the left of photo is a tall engine with SIXTY on the radiator, on right side of photo is a round gas tank that is maybe THIRTY size.
Sixty is listed on eBay too!
Nice crack in the rear case, must have filled with water and froze.
That Sixty the seller has is not the one that's in the background of the D2 pictures, as far as I can tell
Talked with seller, he has around 3 sixty’s and around 3 thirty’s, a 22, 20, 10, 2 Ton and 5 Ton.He’s thinning out the herd!