I'm looking for a photo of the earliest version of the USAF Thunderbirds emblem, as used on the F-84 and F-100 (not the very early wings, star and flame, but the bird with "Thunderbirds" in script underneath).

I've got the huge official image of the present-day emblem from af.mil, but it has the silhouettes of four F-16s in the middle of it. I'm pretty certain the original emblem had something else in the middle, but none of the aircraft photos I have show it clearly enough to make out what it is.

I've spent over an hour with Google and come up empty. Can anyone help, from your own photo collection?

Thanks!