As Henry Jones Sr., Lloyd Owen has blue eyes during the opening sequence, wears brown contact lenses during the scenes taken from Young Indiana Jones and the Curse of the Jackal (1992) and back to his own bright blue color for the remainder of the story.
In the "adventure map" scene Morocco is divided between French and Spanish protectorates. This partition took place in 1912, 4 years after the time of the story.
Appears a modern aircraft carrier is in distance in the harbor scene.