I finally heard back from the Roger-Viollet agency with the name of the photographer: Roger Berson. I was not able to find out much about him, but stay tuned. His name led me to the original shot, taken in August 1944, during the liberation of Paris. Had I found it earlier, I could have saved myself some trouble, but would have missed an enjoyable adventure. The shot is much wider that I realized – notice the hats in the window on the left and the name of the shop that at first eluded me.
So I should dispel any impression that Roger-Viollet does not respond to inquiries, although the response is not rapid. And I can draw your attention to a key detail that I had overlooked – the man in the foreground is carrying a rifle.