vega, after reading your post again and you asking for numbers I went out and looked at mine and got numbers. I googled and learned mine is a 12" plow. It is complete except the two coulter wheels and arms are missing. The rear furrow wheel is there. The numbers on mine read: Type 12-AO-28, No: 40567
I learned it was a match for a TO-20 Ferguson tractor....probably Fergusons match for the 9N Ford as far as tractors. I had doubts/questions as to was it the right plow for my TO-35 and conclude yes, it will work fine. The 35 has a little more power than the 20.
After looking at your plow and the parts breakdown I found online, I see yours is complete except for the "cross shaft", correct name for the part by the diagram. Also it showed "check chains" on the diagram but you'll probably get away with not having them. They may have even been eliminated on your model as I looked and saw no evidence of yours having them removed.
My question to anyone having experience with these plows. Are the coulter wheels a must? What are their purpose other than making a cut in the grass making turning the dirt precise and easy? Can I get away with not having them and what will be the result? Also, what is it worth missing the coulters? I'll probably never use it. Would like to know the value in case someone wants it more than I do.