That serial number begins with the same M0273 as mine, so it might fit a 755. Problem is, the 60 inch deck fits a lot of tractor models and each of those requires its own specific set of mounting hardware. Your problem is very common when buying any used tractor attachments. You have to make sure all the attaching hardware is included and is correct for your model tractor. I know that can be difficult sometimes unless you can see it actually on your model before buying. If you can provide pictures of what you have we may be able to provide some guidance. That is a good sturdy deck and there are a lot of them out there.