English 18k gold full hunter lever pocket watch Circa 1800

Gold lever with diamond endstone
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Heavy, splendid and technically fine English pocket watch with Liverpool windows and Massey-escapement type III by Joseph Johnson Liverpool, circa 1800.
An 18 carat gold, diagonal reeded, case of extravagant quality, case maker’s punch J. C. F & Co, and E.T., matching number on the case and movement, original dome, English lever movement of top quality with bimetallic special balance, diamond endstone, extra large sapphire jewels, so-called Liverpool Windows, Massey escapement with second stop apparatus, extravagant and splendid 4-colored 18k gold dial, blued steel hands, very good condition of preservation, in working order, exceptional quality.
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Diameter: 52 mm
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Weight: 129 g
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Signed:  Joseph Johnson  Liverpool