Artist: Mike Machat
This illustration is from the book
"CHARLES LINDBERGH: An Airman, his Aircraft, and his Great Flights"
R.E.G. Davies, Author

My thoughts about this picture...
Anyone who has read a lot of books on Charles Lindbergh quickly finds that there are a dozen or so photos that get published and re-published over and over again.  Every once in a while a book comes out that contains an fresh photo or two.  In my opinion, it shows that the author has actually done some new research, instead of simply basing his book on those previously published.  CHARLES LINDBERGH: An Airman, his Aircraft, and his Great Flights by R.E.G. Davies is such a book.  It contains many not commonly seen photos.  It also contains several new color profiles by artist Mike Machat of many of the historically important airplanes that Charles Lindbergh flew during his career, from his Curtiss Jenny to the P-38 he flew in World War II.

Like the others, artist Mike Machat's color profile of a Robertson CAM-2 DH-4 contains a some details that are not 100% accurate to the original airplane:

The radiator frame and bottom cowling of Robertson DH-4 #112 should be silver, not black.

I also believe, based on study of all the b&w photos of the CAM-2 innaugural period, that the lettering on the side of the fuselage should be white, not silver.

More info needed!  The caption on Machat's profile seems to be saying that somewhere there is first-hand detailed testimony on the color and markings of the Robertson DH-4s.  Evidently someone interviewed someone else who actually had a hand in painting the airplanes!  I wish the author would have elaborated.