Breguet, "Marine chronometer," sold 1822.
Twin-barrel marine chronometer, mahogany outer case with brass hinges and handles, brass clock case and Cardon suspension, silver-plated dial with subdial for hours/minutes above subdial for seconds, Earnshaw spring detent platform escapement (porte-échappement), 8 1/2 x 7 1/2 x 6 1/2 in. (21.5 x 19 x 16.5 cm).
Collection Montres Breguet S.A.
Image rights: Image courtesy of Fine Arts of Museums of San Francisco