English silver coach watch made for the Islamic market Circa 1752

Silver and tortoiseshell triple cased verge
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A very fine English, silver and tortoiseshell triple cased small coach watch, circa 1752. Made for the Islamic market, the case with London hallmarks for 1752-1753.
Outer case: covered with tortoiseshell and silver pin work forming a scrolling pattern on the bezels, middle case: bassine, polished, inner case: bassine with deep back, polished. White enamel dial, radial Islamic numerals, outer minute track with five minute Islamic numerals. Blued steel beetle and poker hands. A hinged, gilt brass full-plate movement with lyre shaped pillars, fusee and chain, verge escapement, plain steel tree-arm balance, flat balance spring, singlefooted cock pierced and engraved with stylized foliage, silver regulation disc. Dial and movement signed. Property of a French Collector.
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Diameter: 81 mm
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Signed: Markwick Markham  London
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James Markwick & Markwick Markham. James Markwick the elder became Free of the Clockmaker’s Company on August 6, 1666. His son, James Marckwick Jr., became Free of the Company in 1692 by patrimony and died in 1730. The younger James Markwick was an eminent maker, Master of the Clockmakers’ Company in 1720 and a very early user of jewelled bearings. In later years he was in partnership with his son-in-law Robert Markham who succeeded him, under the trading name of Markwick Markham which became famous for watches destined for the Turkish market.