Gold English watch with Massey escapement Circa 1821

Pocket watch with early Massey escapement
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A very heavy English pair cased pocket watch with early Massey escapement, Peter Litherland, Liverpool circa 1821.
18 Carat gold pair cases with matching case maker’s punches circa 1821, Early English lever movement, Massey escapement with Liverpool windows and subsidiary seconds, with diamond endstone.
White enamel dial, gilt hands, and black Roman numerals.
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Diameter: 54 mm
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Weight: 155 g
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Signed: Peter Litherland Liverpool
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Peter Litherland was one of the most important Liverpool watchmakers and inventors of the rack lever escapement.