Very early on in his career, in about 1790 or perhaps even earlier, A.-Louis Breguet was confronted with the phenomenon of forgery. It was a problem which was to increase throughout his career, before diminishing, without vanishing entirely, in the second half of the nineteenth century. Fake Breguet watches far outnumbered real ones.
Any pocket watch bearing an individual number greater than 5500 can be considered fake.
Any nineteenth century pocket watch signed "Breguet à Paris" is fake.
Furthermore watches bearing the inscription "Spiral Breguet" were not made by our firm. From 1880 to 1910, many manufactures added this inscription in big letters to their pieces to lend them credibility, whereas Breguet never used such inscriptions.