English 18k yellow gold pocket watch with open-face Circa 1875

Gold open faced pocket watch by Joseph Sewill
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An English open faced lever pocket watch in 18-carat yellow gold case, circa 1875.
Engraved bezel. Gold cuvette decoratively engraved with floral themes. Highly decorative chased floral dial with Roman numerals and Breguet hands. Full plate, gilded brass movement with fusee and chain, lateral equilibrated lever escapement, monometallic balance (probably in gold), and blued steel flat hairspring. Movement signed.
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Diameter: 40 mm
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Signed: Joseph Sewill