I think the post about what the factory records show in this instance is a much better source of the change dates for BLACK to GREEN to SPOKED.
As can be seen from the posts so far, it doesn't make a difference what your jeep had on it at the end of WWII, it might not have been what it was built with at that point and 62 years after the war ended, what guys find on their jeeps isn't conclusive evidence....since the posts here contradict each other.....
Go with the GPW JS until someone else researches something more convincing (actual factory records or dated factory photos that weren't staged).
GPW 17963 4/24/42 Chester, PA. USA 20113232 (est.)
GPW 85976 12/9/42 Louisville, KY. USA unknown
GPW 108552 4/21/43 Louisville, KY. USA 20371278
Bantam T3 4582 10/29/42 USA 0173499 (est.)