Yes it is a C251. I bolted on a 3pt. Pics 1&2 I have the 2 points that can be bolted back on. This planter was designed by IH to be 1pt fast hitch, 2 point fast hitch, or 3 pt. This is per the operators manual.
Fertilizer distributor was an option on 3pt and 2pt but not for 1 pt. Seems it was too heavy for 1pt tractors.
Row markers where an option.
Pics 3 is a parts pile and 4 is my planter I use every year.