Breguet pocket watch

A Breguet pocket watch is a mechanical portable timepiece originating from the business founded by Swiss watchmaker Abraham-Louis Breguet. After completing his apprenticeship, Breguet established his workshop at Quai de l'Horloge on the Île de la Cité in Paris in 1775. His creations soon attracted the French court, including King Louis XVI and Queen Marie Antoinette. Around 1807, Abraham-Louis took his son Louis-Antoine into partnership, renaming the firm Breguet et Fils.

The workshop produced notable advancements in horology throughout the eighteenth and nineteenth centuries. In 1780, Breguet constructed the Perpétuelle, an early self-winding pocket watch, and in 1783 commenced work on the grand complication pocket watch No. 160 for Marie Antoinette, which was completed in 1827. Breguet was also among the few early horologists to implement the lever escapement in limited production. Following family succession, the firm passed to English watchmaker Edward Brown, with the Brown family directing the business from 1870 to 1970 before production eventually transferred to Switzerland.

Breguet timepieces are characterised by distinct aesthetic traits, most notably coin-edge cases, guilloché dials, and blued steel pomme hands, which became known as Breguet hands. Horologically, these watches incorporated several influential mechanisms, including the gong-spring for repeating mechanisms in 1783, the pare-chute shock protection system in 1790, and the Breguet overcoil balance spring in 1795. Abraham-Louis Breguet also invented the tourbillon in 1801 to counteract gravitational effects, and in 1830 the firm introduced its first keyless watch fitted with a knurled winding knob.

Signatures such as 'Breguet et Fils' should be verified alongside proprietary mechanical elements like the pare-chute shock system or the Breguet overcoil.