English pair cased watch with spring detent escapement Circa 1813

Gold gentleman’s pocket watch by Paul Philipp Barraud
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A very fine pair-cased English gentleman’s pocket watch with spring detent escapement according to Thomas Earnshaw, circa 1813.
Two cases: outer case – 18-Carat gold, polished, à goutte, with case maker’s punch mark MRM (Martin Matthews, Otvord); and inner case – 18-Carat gold, polished, with case maker’s punch mark MRM (Martin Matthews, Otvord). Signed, numbered, off-white, enamel dial with radial Roman hours, auxiliary seconds at 12, and gold spade hands. Full plate movement, keywind, frosted, gilt, signed, chain/fusee, moulded pillars, Z-balance with four screws and two round weights according to John Arnold, freesprung blued helical balance spring with both sides passing terminal curves, and chatoned diamond endstone on balance.
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Diameter: 57 mm
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Weight: 159 g
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Signed: Barrauds‘, Cornhill, London
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Paul Philip Barraud (1750-1820)
Barraud was an English chronometer maker in London. His parents were Francis Gabriel Barraud and Magdalen Benine née Crespin, who was the daughter of a renowned Huguenot silversmith. In 1796 Barraud became a member of the Clockmakers Company of London and a master in 1810/11. He formed a partnership with George Jamieson and William Howells; of Barraud’s 7 children, his sons Frederick Joseph, John and James followed him into the business. From 1796 until 1820 they created more than 1,000 chronometers together.