Massey Ferguson introduced the 1165 tractor in 1980, so any 1165 tractor would have been manufactured in 1980 or after. The exact year of manufacture can only be determined by locating the serial number, which can usually be found near the front of the tractor, near the middle of the dash panel. With the serial number, you can contact your local Massey Ferguson dealer for more information about the year of manufacture for that particular tractor.