This is a Drive Belt for the following welders:
Lincoln PIPELINER 200D KUBOTA diesel engine with the following Welder Machine Code Numbers: 11114 11316 11471 11498 11591 11644 
and
Lincoln CLASSIC 300D KUBOTA diesel engine with the following Welder Machine Code Numbers: 11499 11500 11547 11548 11642 11643 11811 11812.  
The Machine Code Number is on the front name plate.