Those model numbers are for US market tractors. They are older models and I've not seen one with factory ROPS. Perhaps someone saw the tractor and assumed that without ROPS it must be gray market. I don't think that is the case with your tractor. You could take the serial number off the tranny and call a dealer to find out what year it is. If it happens to be a gray tractor, they will get all bent out of shape about it and tell you that it needs to be scrapped/traded/burned/or junked! Silly corrupted dealers.