During Edith's first date with Marcel, a sommelier comes from Marcel's right. Marcel tastes the wine, looks to his left, and tells the waiter that the wine is OK.
Just before a young soldier plays a song for Edith in her apartment, a supertitle reads "February 1940." An issue of "Paris Match," first published in 1949, is on the coffee table.
The caption that opens the Édith/Marcel Cerdan portion, which includes his fight, says "1947." Cerdan fought Tony Zale on September 21, 1948.
Just before Edith drives the convertible, a caption reads "California, August 1955." The car is a 1956 Chevrolet, introduced in November 1955.