I am currently in the process of completing the most up to date serial number list for IH tractors to date. This list will take me some time to compile, but if you look closely I have found some starting serial numbers for specific models that you won't find elsewhere. If you have any questions, let me know.

CLICK HERE FOR THE MOST COMPLETE LIST OF KNOWN BEGINNING SERIAL NUMBERS

McCormick Deering W-40	Farmall Regular
Farmall F-20	Farmall F-30
20 Industrial	Farmall F-12 & F-14
Farmall A, B, BN, AV, AI	Farmall M, MD, MV, MDV
McCormick Deering W6, O6, OD6, ODS6, OS6, WD6, ID6, I6	Farmall H, HV
Farmall CUB	McCormick Deering W-4,O-4, OS-4, I-4
McCormick Deering W-9, WD-9, WR-9, WDR-9	300 Farmall
400 Farmall	350 Farmall
450 Farmall	International 330