English self strike coach watch for the Ottoman market Circa 1800

Heavy silver verge coach watch by Markwick Markham
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A fine, heavy verge English coach watch with quarter-hour self strike, circa 1800. Made for the Ottoman market.
Silver case, the backside florally engraved, around the edge openwork decoration, with florally engraved bezel and pendant, large lateral hinge, and rear bell. Enamel signed dial with radial Ottoman numerals and blued Poker & Beetle hands. Full plate movement, keywind, applied florally engraved ornaments, fire gilt, signed, chain/fusee, two hammers, square baluster pillars, three-arm steel balance, and very finely engraved pierced balance cock.
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Diameter: 85 mm
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Weight: 453 g
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Signed: Markwick Markham, London
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James Markwick & Markwick
 Markham James Markwick and his son James were fine watchmakers and worked in London. The elder was apprenticed on 25 June 1656 to Richard Taylor and Edward Gilpin. He became free of the Clockmakers’ Company on 6 August 1666. Six apprentices were bound to him between 1674 and 1699. In 1673, he succeeded the business of Samuel Betts behind the Royal Exchange. Although he held office in the Clockmakers’ Company, he was irregular in attendance, ceasing to tend to its affairs after 1700. He worked until at least 1706. His son, James Markwick Jr., became free of the Company in 1692 by patrimony. 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 using the trading name of Markwick Markham, which became famous for watches destined for the Turkish market. Not only did this notoriety encourage the appearance of spuriously signed watches, but at the end of the century, Markham, or his successor, associated the names of other watchmakers with their products intended for the East. The makers thus found associated Francis Perigal, Peter Upjohn, H. Story, Borrell, John Johnson, Louis Recordon, Dupont. All were reputable watchmakers in their own right, selling other products under their names.