Gilt metal onion watch with a single hand, hinged case with smooth back, gilt and chased dial with enamel cartouches called "rond de bosse" with Roman numerals for the hours and Arabic for the minutes, mechanical movement with key winding, chased and pierced cock with pendulum, verge escapement, signature on the plate SEBILLE in Paris. Sold as is with no guarantee of function. Late 17th century. Diameter: 56.5 mm