For a discussion of their work see Jaquet, Eugène and Chapuis, Alfred, The Technique and History of the Swiss Watch, pp. 154-156. The firm was listed as 'Geneva makers 1810-1835'.
Chapuis notes that Rochat and his son worked for the firm of Jaquet Droz and Leschot and reprints a letter from Droz and Leschot which reads '6th December, 1804, to Messrs. Rochat et Fils, Le Brassus. In reply to your esteemed letter of 22nd November, there is no need for you to come here specially but only when you happen to be coming to Geneva. We want you to make a bird which will serve as a model for the cartels you manufacture, so that you can tell how long this will take you'.
For a biography on Frères Rochat and illustrations of their work, see Bailly, Sharon & Christian, Flights of Fancy, Geneva, 2001, pp. 211-260.
The finely painted enamel medallion is possibly by the hand of Jean-Abraham Lissignol (1749-1819).
Due to the unidentifiable nature of the bird feathers on the present lot, it is not possible to legally export this piece from the United States.
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