TractorData lists the Farmall 856 as a variant of the IH 856 and the description implies the Farmall 856 were all "Custom" models, is that correct? It seems odd they would classify them as different models, then start both models with the same serial number and yet have such a drastic difference in the serial number sequences going forward. I also understood the Custom was not as common but the serial numbers indicate there were way more Customs produced than IH versions. I know the Custom will have a CU on the data plate but does it mean that they produced an IH 856 and a Custom (Farmall) 856 with the same serial numbers? Does the S-Y behind the serial number mean anything.
I ask more for curiosity and my own edification really. I just bought an IH 856, ser 13785 so its a 71 model, but that serial number would have been used in 68 on the Custom version and that just seems odd to me.