Bobcat machines don't have model years like vehicles. All parts and manuals are serial number driven. A 743 manufactured one year will be exactly the same as the next year if there was no change in the serial number prefix. If you just want to know when your machine was manufactured you call Bobcat Marketing at 701-678-6165 and they can tell you. This doesn't mean your machine was sold and put into service then, it could have sat in inventory for quite a while.