This bowl is a real oddball in the toilet world. That large hump on the back is a vent, the bowl itself take an oddly configured closet flange, and while the shape of the bowl matches a round front seat, the seat hinge will need to be 6 3/4″ on center. The closet spud is also odd, it’s a 2″ Maddox spud. We’re thinking this may have been for commercial applications, and is best used as a replacement for a broken bowl. As for condition, there is some minor scuffing on the bowl and one chip on the right side of the rim. This is definitely a weird one!