The race scene about 53 minutes into the film, is the 1964, 24 Hours of Le Mans. The actor Jean-Louis Trintignant's (Jean-Louis Duroc) uncle is in this race, driving a Maserati Tipo 151/1, #2. He is Maurice Trintignant, a Grand Prix and sports cars racer. He won eleven Grand Prix races (some non-points races) and the 1954, 24 Hours of Le Mans.
The magazine Jean-Louis Duroc was reading, as his son drove the Ford Mustang, is the October 29, 1965 issue of Time magazine. The picture on the cover was that of Bill Moyers, with the heading of " The Young Man Next To The President".