Solid English pocket watch with chronometer escapement Circa 1860

Gold pocket chronometer watch by Mathez & Brother
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A fine and solid English pocket watch with chronometer escapement, London, circa 1860. Very rare high-quality movement, keywind, frosted, gilt, signed, with screwed chatons, and screw compensation balance, blued helical balance spring.
18 Carat gold plain case with reeded band, gold dome with engraving Mathez & Brother, London.
Off-white enamel dial with radial Roman hours and outer minute track, auxiliary seconds, blued Fleur de Lys hands. Dial, case and dome signed.
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Diameter: 50 mm
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Weight: 101 g
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Signed: Mathez & Brother, London
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Reference 0023000