English decorative gold duplex pocket watch Circa 1840

Gold open faced pocket watch
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An extremely rare, decorative pocket watch with turnable case so called “Cabriolet” wearable as a lepine or as hunting cased watch, circa 1840.
With duplex escapement and eight-day movement, an 18 carat gold case, enamel dial, bridge movement, two barrels, three arm brass balance.
This pocket watch is particularly striking because of its exquisitely ornamented case: the outer case, the inner bezels and the case band are decorated with elaborately engraved flowers and fruit. Inside the lid is a marvelously executed engine turned pattern. The inner case features equally fine adornments: back, bezels and case band of the watch are lovingly decorated finely engraved summer flowers, acanthus leaves and pieces of fruit.
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Diameter: 55 mm
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Weight: 124 g
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Signed:  Mathez & Brother  London