Ferdinand Berthoud
Ferdinand Berthoud (1727-1807)
Important maker of chronometers who flourished in Paris in the 18th century. He was born in the Principality of Neuchâtel (now Switzerland).
See Wikipedia entry.
Many examples of his clocks and watches are on display in the Musée des Arts et Métiers in Paris. See here for a summary of Berthoud-related items at the Musée.