The name of the brand is "Massey Ferguson" not "Massy Fergusson".

The reason I know that is not that I'm a farmer. It's that 20 years ago a bunch of friends and I wrote and performed a parody song of Gainsbourg/Bardot song "Harley Davidson" where the motorbike brand was replaced with the tractor one.

"Je n'ai besoin de personne en Harley Davidson"

became

"Je n'ai besoin de personne en Massey Ferguson".