Breguet “Messidor”

A man’s wristwatch fitted with a Breguet “Messidor” tourbillon device whose cage rotates once a minute. Hand-engraved movement. Silvered dial bearing the famed “secret signature”. 18K gold case with transparent back. (BRECUET “Messidor”)
Abraham-Louis Breguet filed the patent for his “tourbillon” device, a rotating frame containing the watch’s escapement, on the 7th of Messidor, Year IX, of the French Republican calendar (27th June 1801), hence the name of this creation.