Built similar to that one,, LH caster wheel looks about the same, mine had a straight disc blade behind the tail wheel you used a lever to snap it in the ground with,, I used it on a lot of acres,, as then I had four different farms with about every kind of soil we have to deal with, the sandy/lighter ground it worked real well in,, the heavy gumbo,, well we always made the comment it would "try to outrun you" when it got a bit to big of bite in that,, my Dad was raised on a farm in Colorado and they had sand to farm,, they used one ways a lot there,, all smaller ones like you posted though, 9/10/12' ones is what they had,, BWF maybe was the # on the disc,, it did have big single flotation tires,, also had the double row gang bearings,, those always seemed high priced to me,, I know we kept it because it was we had little hard cash in it so I cant really complain too much,, wish I had a pic of it today,, it was as i remember a bigger heavier made one than I had seen from them before or since,, but it sure did not like rocks not way no how,, the front blades before the bearing would catch one and snap the shaft right off,, we tried having it welded then it would nto have good temper and would bend at the first thing,, so I would replace the shaft, Ugly job lol I am thinking the spacing on it was 10" give or take it was wider than a normal tandem disc had, more like a off set,, but where it ran at a great angle it rolled the dirt over decent if you could keep the tail planted the Case model 110 Discer/Seeder I posted is not as big a cut as the JD was the Case is 15' and was built heavier than a discer/seeder is,, Case also made them both ways