Conversation so far:
What are some of the references made in the film Hugo?
The film Hugo makes references to Georges Méliès' profession, the Theatre Robert-Houdin, which he owned, and the demonstration of the Lumière brothers' camera which made him interested in film.
What events happened in the film Hugo?
In the film Hugo, Georges Méliès was forced into bankruptcy, his film stock was melted down for its celluloid, and he became a toy salesman at the Montparnasse station.
What is the Le voyage danes la lune?
Many of the early silent films shown in the movie Hugo are Méliès's actual works, such as Le voyage dans la lune from 1902.
What other references are in the film Hugo besides Le voyage danes la lune?
Several viewings of the film L'Arrivée d'un train en gare de La Ciotat are portrayed in the film Hugo, depicting the shocked reaction of the audience

Question: What watches has Henri Maillardet made?
Self-contained rewrite: What watches has Henri Maillardet made?