Swiss very big pocket watch for the Chinese market Circa 1870

Gilt open faced pocket watch probably by Bovet
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A very big Fleurier pocket watch for the Chinese market, circa 1870.
Gilt case with Chinese signature. Glazed movement, engraved and gilt Fleurier movement, very big balance and cylinder escapement. White enamel dial with Roman hours, Arabic minutes, steel blued spade hands and center seconds.
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Diameter: 61 mm
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Weight: 120 g
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Signed: No name
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The watch has the same caliber as the large enamel watches and it is very rare because of its size and unusual construction with cylinder escapement.