international 606 sn #

[old blue 642]

I have an International 606 diesel tractor with loader. The serial number on the tractor is 6401 with a couple of letters afterwards that i don't remember. Is this one of the first 606's built in 1964? or does that number mean nothing with respect to that.

 

[rustred]

that would put your tractor as a later 1965 model.the letters would be for options on it.