The so-called "oignon" watches were made in the late 17th and early 18th centuries, the name derived from their bulbous form resembling an onion. Such watches were commonly cased in chased brass, occasionally in silver and very rarely in gold.
The false or "mock pendulum" was a particularly popular decoration around 1700, featuring a small arm visible trough an aperture and moving in unison with the balance, resembling a pendulum usually found in clocks.
Signed by Dentand in Geneva, probably François Dentand (1671-1754) who specialized in English style and complicated watches, the present watch is preserved in very good condition for its age. Its appeal is enhanced by the double mock pendulum, a date window and the unusual case material.