French 20k gold quarter repeating pocket watch Circa 1802

Gold open faced cylinder watch
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An important gentleman’s quarter repeating pocket watch in a Tavernier case, circa 1802.
20 Carat gold polished case, case design collier by Pierre-Benjamin Tavernier, with pusher for repetition via pendant and case maker’s punch mark PBT (Pierre- Benjamin Tavernier). Enamel dial, signed Breguet and rear signed Borel 73, with Arabic Breguet numerals, additional secret signature below 12: No. 1004 Breguet and Breguet hands. Keywind, gilt bridge movement with two hammers / two gongs, standing barrel, ruby cylinder, shock protection-parachute, ruby cylinder escapement, three-arm brass balance, and blued balance spring with bimetallic compensation curb on the index.
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Diameter: 56 mm
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Weight: 143 g
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Signed:  Abraham-Louis Breguet  Paris
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According to the original Breguet documents, Abraham Louis Breguet’s employee Monsieur Charot sold this watch on Prairial 22, an 10 (June 10, 1802) to Monsieur Castaneda for 1,410 francs. The production costs came to 1,079 francs – with a copy of the Breguet.
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The name of Castaneda comes up in Abraham-Louis Breguet’s correspondence and appears frequently among the buyers in Breguet’s sales ledgers. As is explained by Emmanuel Breguet in his book, Breguet Horloger Depuis 1775, Mr Castaneda was one of the couriers. These were specialized companies handling commercial transactions as well as the transport of merchandise, in this case between France and Spain. Mr Castaneda must therefore have been a Spanish businessman who traveled regularly to France, liaising with important Spanish clients, and particularly the Spanish royal court.