Hmmm, yours looks quite a bit better than what I started out with.
Just an FYI, the F40 was only made in 1956 and 1957, the last of the true Ferguson's after the merge with Massey. A little over 9000 of them were built i believe. They originally came in grey w/green belly(very early one's, very rare), beige w/green belly, and beige w/silver belly. Most were beige and silver.
They are fairly collectable.
More useless info that you probably didn't want to know.
Nice tractor!
Tom B