With Breguet Certificate no. 4370 dated 23 March 2012.
Sold on 13 February 1817, to Charles François Armand de Maillé de La Tour-Landry (1770-1837), 2nd Duke of Maillé (1791-1837), for the amount of 3'600 francs. He was the father of Claire Clémence Henriette Claudine de Maillé de La Tour-Landry (1796-1861), Duchess of Castries, one of the most famous mistresses of Honoré de Balzac (1799-1850), French writer.
On this watch, because it has centre-seconds, the time setting is performed by opening the front bezel and inserting the winding-key into the hole at 3 o'clock. With this action, a sliding pinion moves and comes to mesh with the motion work.
The jump centre seconds system, so-called by Breguet Secondes d'un Coup, is a form of seconds indication for a watch. The seconds hand jumps from second to second to indicate the passing of whole seconds. This mechanism is fully explained and illustrated by George Daniels in his The Art of Breguet (1975), p. 350, ill. 424a-b.
The minute repeating mechanism is explained and illustrated in op.cit, pp. 341-342, ill. 415a-b.
The table for the months and the equation of time engraved on the cuvette gives the difference in minutes, between solar time and mean time, for some dates of each month.
The pare-chute (parachute) suspension is a safety device invented by Breguet to protect the pivots of a balance from damage if the watch is dropped or knocked. The bearing is fitted into a spring which flexes with the inertia of the balance and allows the shock to be taken by the stronger pivot shoulders of the balance staff. Sometimes it was called suspension élastique. This invention is fully explained and illustrated by George Daniels in his The Art of Breguet (1975), pp. 331-332, ill. 407a-b, 408 and 409a-b.