Larry,
Ford used the high F hubcaps into 1917, with nickel plating and of course a black background as was used on all hubcaps from about 1912 - 20. There were likely more than one supplier so there might be both types of caps being used in some years. As far as documentation goes if you have a photo from a certain year that shows what you describe and then you restore the car that way no one can say that you are wrong.
