French watch with two time zones and centre seconds Circa 1840

Gold pocket watch by Charles Oudin
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A rare French pocket watch with two time zones and independent jumping centre seconds, circa 1840.
18-carat gold engine-turned monogrammed case with numbered and signed gold dome. Inner lid with presentation engraving: J. Qunicey Jr. from J. Mason Warren 1856. Enamel regulator dial with eccentric radial Roman hour indicator I-XII and Arabic hour indicator 1-12, independent jumping centre seconds with stopping device, auxiliary seconds and Breguet hands. Bridge movement, keywind, frosted, gilt, two going barrels with click works, cylinder escapement, three-arm brass balance, shock protection parachute and temperature-compensating balance spring.
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Diameter: 55 mm
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Weight: 107 g
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Signed: Ch. Oudin
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Mason Warren J. Mason Warren was a leading surgeon and performed pioneering work in plastic surgery while at Massachusetts General Hospital. J. Mason Warren performed the first rhinoplasty procedure in America in 1837.