I've the same image gemmer posted in my archives, and this is the source I have recorded for it: (scroll down about 2/3 of the page)
http://www.defensemedianetwork.com/stor ... greatness/Here's the caption for the photo from that page:
"The only known photo of the P-40Es of the 13th Pursuit Squadron (Provisional) at Richmond Field, Sydney, Australia, Feb. 13, 1942, after being hastily assembled and painted – some with non-standard insignia. One bears the name FU MANCHU, a reference to the fictional master killer created by British author Sax Rohmer. Nearly all of these P-40Es went to the bottom of the sea when the Japanese sank the USS Langley. Photo courtesy of Texas A&M University Press"
Mark, that shot you posted is one of a series of press photos... here's another from my collection.

Project 914 Archives (S.Donacik collection)
And here's the reverse of the print, which should answer your question:

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