Doubtful. Massey doesn't really need to claim anything besides Massey Ferguson, Ferguson, and Massey Harris production #'s to get a high total. They stuck with a proven design for several decades, just recently giving up on a design concept that's been around since the early 1950's.
I've owned about every brand of small utility tractor made over the years. I'll argue with anyone ANYTIME, that the MF 35/135-50/150 was (still is?) the best tractor of its size EVER. Simple, durable, efficient, reliable, and has incredable resale value.