[Parley Baer]

P51C is the early model before the “bubble” canope. This is also the first time I have seen whitewall tires on a P51 or any airplane for that matter.

[Ready4Freddy]

The ‘D’ model w/ the bubble canoy arrived in Europe just about the same time as the Eiffel Tower exploit, but were initially assigned only to bomber escort until their production #s increased.

[tanknetter]

This is also the first time I have seen whitewall tires on a P51 or any airplane for that matter.

It wasn't a consistent practice, and was pretty rare. Even within the 357th FG (Overstreet's unit) some, like Berlin Express and Bud Anderson's "Old Crow" did (at one point or another) but Chuck Yeager's "Glamorous Glen III" did not.