Sometimes, if done right, a vignette is more powerful than the entire scene. This is such a case in point. The main focus of the photographer seems to be the wood-rimmed entrance of this brick building and, indeed, the brightly lit 'Entrance' sign.
The vignette of the left car rear and right car front frame the composition and the vignette of the Chevrolet sign, cut off from its identification, solidify the view as a mysterious, though well lighted street scene.
I agree with your assessment Charles and with you Chris. And also agree that it very well may be one of his best ever!