This is a super nice all original Ford radiator cap which is correct for 1965 and 1966 Mustang models.   Is in excellent original condition and has all the correct markings.  No rust or corrosion.  Nice original zinc plating.  THIS IS NOT A REPRODUCTION CAP!  Would look great on an early Mustang show car.   Has been installed but it is really nice as you can see in the photos.   This is a very visible item when you open your hood so you really want to have the most correct original cap on your show car.