[PIMBO]

I have owned an old Mountfield M1 for about 20 years. It is fitted with only one rotor and one coulter disc on each side. Having viewed a handbook on-line, I realise that it ought to have at least two rotors on each side. I will have to acquire additional rotors but would first like to know if they are all the same size and shape. The handbook does not explain.
Can anyone explain please?

[Bigbadfrankie]

Tes they look the same, very rare now