I don't think that the Trimo Ferguson item has any connection with Ferguson or Massey Ferguson tractors. It's pure coincidence. Trimo Ferguson produced a range of sheet metal working tools, dollies and spoons etc for removing dents and shaping metal as required.
The other item I believe is what we in the UK would recognise as a MF 196B valve seat cutting tool. It is used to recut the poppet valve seats in the chambers of the Ferguson hydraulic pump. Two seats have to be cut concentric to eachother.
I suspect that the size is somewhat smaller than the impression given in your photo.
DavidP, South Wales