Historically interesting English 18K gold verge watch Circa 1775

Gold verge in pair cases by Alexander Cumming
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A historically interesting English 18 carat gold pair cased verge pocket watch, circa 1775. Full plate movement, chain and fusee, and a three arm steel balance. White enamel dial with Roman hours, an outer minute track, Arabic five minute numerals and decorative hands. A plain outer case with the engraved coat of arms of the Scottish clan Mitchell and the motto Favente Deo Supero (with the favour of God above I am superior), maker’s mark MR, the inner case is also polished, an engraved coat of arms on the back, monogrammed AM for Admiral Sir Andrew Mitchell and with the same motto as on the outer case, maker’s mark IR. Case numbered, movement signed and numbered.
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Diameter: 54 mm
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Weight: 146 g
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Signed: Alex Cumming London
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Alexander Cumming, 1732 – March 8, 1814, was a well known Scottish watchmaker and instrument inventor who moved from Edinburgh to London in 1777. In 1766, he published his book ‘The Elements of Clock and Watch-work’. Cumming specialized in chronometers and was the first to have the idea of ​​using a cylinder escape wheel with curved teeth. He was also the inventor of the modern water closet.
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Admiral Sir Andrew Mitchell, born in 1757, was Admiral in the Royal Navy and Commander-in-Chief of the North America and West Indies Station from 1802 until he died in 1806. He was the second son of Charles Mitchell of Baldridge, Dunfermline, Scotland.