Change from one month to another is approximate

Schermafbeelding 2016-06-27 om 12.24.43USANumberFord

The numbers on the hood were painted in a blue drab colour.  At the beginning of 1945 this was changed to white, but still only in one factory * style.
* Of course at any time during the WWII, once in the hands of the motor pool or field units, every imaginable style of white lettering seems to have been used.