I just got this yesterday and I'm completely lost, what the heck is this? I have never seen a center section with so much offset except on the front diff of a 4X4 I'm assuming the shocks mount on those small brackets on the tubes Square pad with 4 bolts like on a Model Y but as far as I know they didn't have a banjo and were centered. Mechanical brakes with round shield. The center section on my mystery banjo has a diameter of 10" and a width of 3-13/16" just like the 35/48 banjo. The input shaft has 6 spline and 1" diameter. The pinion has 5 tooth and the ring 41, I checked the ratio, it's about 6.5:1 I thought it was something for a tractor but I've seen that there is a 6.17:1 reproduction ring, so pretty close if not the same. I measured roughly a ring diameter of 8.5" close to the 8.63" it should be, so I assume it's the same. The width from backing plate to backing plate is 48-1/2" and the distance between the spring eyes is 44". The axle tubes are very skinny compared to my '46 banjo. Since I'm in France I point out that the bolts are UNF with 9/16 heads, not those weird bolts we had on some products with metric heads and imperial threads. I just don't know what it came off of since it's absolutely not a US Ford car unit : Mathis, Matford, Chenard & Walker, Ford SAF, Ford UK, Fold Köln, or some kind of industrial thingy? Or did Ford supply other manufacturers with their differential? Those casting numbers didn't bring anything on the Net.