Factual error: Emily on the ship orders a bottle of Louis Roederer's top of the line champagne, Cristal, with its distinctive bottle, and specifically the 1929 vintage. In 1937, it'd have been a bit too much "top of the line", though; Cristal was commercial produced only since 1945, so in 1937 when the movie takes place you wouldn't have been able to casually order it for dinner on a cruise ship.
Factual error: The movie presents the location of Qumran as a tourist destination with intensive excavations. In 1937, Qumran was definitely not a tourist spot; it was not unknown, but the name value of the area was established only after the discovery of the Dead Sea Scrolls a decade later.
