Is the serial/model number stamped somewhere on a casting or is it only on the serial number tag for a S44 or 440?
The tag does not match the paint scheme, I know some S44s where repainted to 440 colors so I can not go by paint. 

Does anybody know what the physical differences there is between a S44 and a 440? Assuming you are not sure that the serial plate has not been orginal to the tractor st and you can not trust the paint.
S44 and 440 info is pretty hard to come by.

Any help would be greatly appreciated .

BMD
Update --here's a photo


Would someone know if there are any casting numbers that would help
confirm which model I have and where they my be?
The engine tag is stamp f140 407, but I have been unable to locate any casting stamps.They are probably hiding under 50 year of usage.

It really does not matter which model I have just want to go back correct
to original. Maybe I can find one at the NC State Fairgrounds show in May to compare against

As before,any and all help would be greatly appreciated.