Abraham-Louis Breguet, ‘Tourbillon watch’, 1809, Legion of Honor

Breguet, "Tourbillon watch," sold 1809.
Engraved gold case, gold dial with Roman numerals for the hours, three subdials for running seconds (on the left), for seconds on demand (right) and for the power reserve (below); gilt metal 24-lignes half-plate movement with inverted fusée, natural escapement fitted in a two-armed carriage performing one turn every four minutes, diameter: 2 1/2 in. (6.5 cm, 65 mm).

Image rights: Image courtesy of Fine Arts of Museums of San Francisco

About Abraham-Louis Breguet