Patrick, WELCOME!
The 1250 is the model number... If you post the complete S/N including all the numbers before and after the U we can tell you for certain if it is a 1250. Belt for use on a 1250 with a 44" mower deck would be part# IH-59971-C1 and should be 3/8" x 78".
The 1250 is the model number... If you post the complete S/N including all the numbers before and after the U we can tell you for certain if it is a 1250. Belt for use on a 1250 with a 44" mower deck would be part# IH-59971-C1 and should be 3/8" x 78".