When Waldemar first brings the two young ladies to his house, the film crew can be seen reflected on the side of the car.
Though the setting of the story is supposedly France, the architecture of the buildings shown is clearly Spanish, the actual location of the shoot.
Elvira's name is always pronounced "Elvire", without saying the final letter A; except once when Marcel is talking with the mayor, and calls her Elvira. Even Marcel pronounces her name the other way in every other instance.