looked at D6

Went and looked at a D6 today. Serial #9U3981 pony motor, and CCU on back. Been sitting for some time. What year would this be?
Also measures 94 1/2 inches wide and has 20 inch pads on it. Is there such thing as a wide gauge D6 or is this thing standard?

By my book 1949. Start of production1947 end 1959 total 29764, 9U wide gauge 8U narrow gauge 11045 produced A very good tractor in its time, A big improvment the oil clutch became available around 1954 someone will know the exact serial number break. Same bore stroke as the U series D4 many componets identical. cheers WF

Thanks for the quick response. The owner has not come up with a price yet. it looks to be complete. This unit does not have a blade on it and never did. but does have the CCU unit on the back. Need to figure out what model the CCU is.