No matter what Fred's is a 1947.
Funny this should be posted today. Yesterday I was able to barrow copies of the fallowing books through inter-libary loan and the UofArizona:
C.H.Wendel's "The Allis-Chlamers Story"
Norm Swinford's "A Guide to Alis-Chalmers Farm Tractors"
And Norm Swinford's "Allis-Chalmers Farm equipment, 1914-1985"
Wendel's gives a list to W Speed Patrol's identical to this sites, with the addition of end years.So:
Norm Swinford's "A Guide to Alis-Chalmers Farm Tractors" gives the SAME as Wendel's list except it says that the end number for 1946 was IF1437. At first I thought this could be a tipo, BUT
Norm Swinford's "Allis-Chalmers Farm equipment, 1914-1985" gives that all W Speed Patrols built in 1946 or later, IF.
So Old, dose your parts manual have any serial number list, or pages where it says such and such part was only on graders after such and such sn?
Maybe the special/optional clutch peddle some talk of, or the way the front extension is mounted to the WC frame rails?
Wish Agco had that book online like they do the WC, WD/WD45 and many of the implements, so I could see a complete copy myself without spending 40 or so dollars for the one this site sells. Guess eventually I'll just have to bight the bullet and buy one, but $40 seams pricy to me.