The 9N has i-beam front radius arms, the 2N has tubular arms (like yours). Assuming they are the original equipment id guess you have a 2N, but you never know what happened in its history. Parts are interchangeable from one model to the next. It doesn’t matter because she can still do the work.
Nice. I have the same plow, but have a 1951 TEA20 Ferguson tractor.
Those old pliws work great
The 9N has i-beam front radius arms, the 2N has tubular arms (like yours). Assuming they are the original equipment id guess you have a 2N, but you never know what happened in its history. Parts are interchangeable from one model to the next. It doesn’t matter because she can still do the work.