The plane is a DC-8, one of 25 airplanes that Pan Am ordered from the Douglas company in 1955. The Pan Am airplanes that featured in the official Bond films during the Connery era were Boeing 707s.
Royale-les-Eaux features in both Ian Fleming novels Casino Royale and On Her Majesty's secret Service where it is a seaside resort somewhere on the north-western coast of France. Formerly a fishing village but more of a fashionable tourist destination in the novels it is supposedly located just south of Le Touquet. At least according to Fleming's description in chapter 2 in On Her Majesty's secret service.