That picture is 2 factory fresh P-38s over the San Gabreal Mountains, just several miles from the Burbank factory - several prints of that photo was found all over the old Burbank plant.
This was from the 39th FS website, Tommy Lynch's P-38, Bong's first P-38 was probably similar...
Here's a 1943 mount 9th FS, 49th FG, Russian site
We always hear about Bong's P-38 "Margie" but he actually flew many missions in a P-38 named "Downbeat" and it was in this aircraft where he and Tommy McGuire flew many missions together.
From a Russian Site:
