In the opener, the hands of the clock are moved to twelve o'clock position to trigger the fireplace to open the secret passage to below. After the fireplace is shown open, the clock hands are not at twelve, but both close to one o'clock position.
When the action moves to a wine cellar, small casks are atop a narrow shelf: a handful of corks are strewn on that shelf. When shots are fired, the corks have suddenly disappeared.
When Currier is being interrogated on the bed, the actor incorrectly calls the lady bandit "Laurabell Lee" when her name is Lauralee Bell. Somehow got it past the director without a retake.