English silver tortoise shell watch with four cases Circa 1776

Large pocket watch for the Ottoman market
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An especially large pocket watch with four cases, made for the Ottoman market by Markwick Markham in London, England, circa 1776. This watch has four cases crafted from silver and covered with tortoise shell. The outer case has a typical Ottoman design in high relief, the 2^nd case has tortoise shell and ornamental nail decoration and both inner cases are plain and have matching London Hallmarks from 1776. The white enamel dial has Ottoman hour numerals and black steel hands and the movement has an early English verge escapement.
The dial and movement are signed.
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Diameter: 81 mm
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Weight: 277 g
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Signed: Markwihc Markham, London
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The item presented here has an impressive size and was made for the Ottoman market, by one of the most important London makers of this type of pocket watches.