There is a female character who does not speak English except for phrases 'taught to her by sailors.' They would have been mildly suggestive at the time of the film's release but most kids today either wouldn't get the jokes or understand they were meant to be racy.

Some explosions.

Per the norms at the time, much of the cast is either smoking and/or drinking cocktails throughout the film.

One of the major characters is a master of knife throwing. Even when he attacks, it's more implied than shown on screen but his character's knife obsession could be intense for certain viewers. It's not so much visible violence as implied threat.