Handwritten letter referring to the 1806 Exhibition in Paris - Lot 51

Handwritten letter referring to the 1806 Exhibition in Paris during which Breguet presented numerous innovations. Handwritten letter being an excerpt from the report of the jury of the products of French industry on the 1806 Exhibition with a handwritten letter mentioning "Chap. 19 p. 146 machines de précisions ... 440 Mr Breguet, place Dauphine à Paris obtained a gold medal at the exhibition of year 10, this famous artist presents today : 1. A mechanism called a parachute, which protects the balance wheel from accidents... 2. Several time grades which, by means of a tourbillon mechanism, maintain the same accuracy whatever the position... 3. Timekeepers without the tourbillon mechanism... they have a free escapement... 4. Natural escapement... 5. An escapement called by Mr. Breguet échappement double ... the jury having not seen this escapement applied to a moving machine will not express its opinion ... but it can announce that its execution is the height of skill and perfection...".