"Garde Temps" was Breguet's term for watches of the highest quality. His fusee watches are very rare; only about 20 were ever made. The present watch is the first pocket chronometer with fusee; all the previous ones had a double barrel. It is the first example of the final development of pocket chronometers by Breguet. A single barrel with fusee replaced the twin barrel caliber of the earlier type and the movement is of a more robust construction throughout.This watch shows similarities with English chronometer movements. By the year 1818, English chronometer makers, particularly Earnshaw, had begun to produce such instruments in substantial numbers and supply them to both merchant and naval shipping. The advantage gained by the use of an accurate timekeeper for navigation was significant in the struggle between countries for trading superiority, and the French Navy was in no less need of such watches and box chronometers than their English rivals.If such instruments could be made reliable and not over delicate, they could remain on board a ship for longer periods between servicing. Furthermore with the end of hostilities after Napoleon's departure from France in 1815, the market was open for competition with the English chronometer makers; indeed, Breguet adapted certain features developed by such makers as Earnshaw and Arnold (his respect for the latter being well-known, to the extent that Arnold's son spent some time training with Breget), but as is the case with this lot, he continued to demonstrate the unique style of the firm.