English rare and important large gilt metal lever Circa 1798

Important large watch showing both mean solar and sidereal time 
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An English rare and important large gilt metal lever watch showing both mean solar and sidereal time and possibly the only lever watch known signed by this maker, circa 1798, gilt metal back plate with decorative engraving, large aperture surrounding the balance, straight line lever escapement, large three arm bi metallic balance with screwed wedge shaped weights, flat balance spring, diamond end stone, white enamel dial, three subsidiary dials and three rotating dials showing hours, minutes and seconds, as the hands advance mean solar time is read against the fixed dials, sidereal time read against inner dials which contra rotate, plain gilt metal case with maker’s mark IH for John Hadle, dial signed, movement signed Geo. Margetts, London.
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Diameter: 69 mm
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Signed: Geo. Margetts London
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For a detailed discussion of astronomical watches by George Margetts

This Margetts watch is significant as it remains the only known Lever watch signed by Margetts. The combined display of sidereal and mean solar time on the dial is also unusual.