There is no known author named Estienne Breguet. There is, however, a famous watchmaker named
Abraham-Louis Breguet (1747-1823), who was a renowned watchmaker and inventor. He founded the renowned watchmaking company
Breguet, which still exists today.
It's possible you may have misremembered or misspelled the name.
Would you like to know more about Abraham-Louis Breguet and his contributions to watchmaking?