English gold verge watch made for Ottoman market Circa 1813

Gold and enamel verge in triple cases by Markwick Markham 
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A magnificent English 18 carat gold and enamel triple-cased verge pocket watch made for the Ottoman market, circa 1813.
The outer and the intermediate case with a scalloped band decorated with opaque light blue and translucent red champlevé flowers, partially open-worked. Furthermore, the intermediate case has a fine polychrome enamel painting on the back depicting a Turkish coastal area with two sailing boats against an engine-turned translucent pink-coloured background, on the shore a typical contemporary lighthouse and a fortified town at sunrise, maker’s mark AN for Augustus Newman, London, a rear bell. Signed white enamel dial with radial Ottoman numerals and gold poker & beetle hands. Signed full plate fire gilt movement, keywind, chain and fusee, second barrel for the self strike, two hammers, verge escapement, three-armed steel balance, very finely florally engraved and pierced balance cock.
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Diameter: 48 mm
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Weight: 114 g
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Signed: Markwick Markham Perigal London
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The movement as well as the case design of the watches intended for the Turkish market were already outmoded around 1810, and even more so in later years, nevertheless Edward Prior and some of his contemporaries such as George Prior II, George Charle, Markwick Markham-Perigal and Isaac Rogers specialized in this type of watch because there was an ongoing demand for them on the Turkish market, be it from tradition or from a true love of the elaborately ornamented movements and cases. It is quite possible that many of these watches, the one we have here among them, never even left England because of their exotic beauty and had devotees in their own country too. Very often these buyers kept the watch safely in a drawer like jewellery, which explains the mint condition of some of these marvellous pieces, as is the case with the present watch. The exquisite gold and enamel cases were probably created by goldsmith Augustus Newman in 7 Plumptree Street, Bloomsbury, London, whose mark appears for the first time on November 4th, 1813. It is still unknown who painted the gallant scenes on the outer cases, though.
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Markwick Markham. James Markwick and his son James jr. were both fine watchmakers and worked in London. The elder was apprenticed on 25 June 1656 to Richard Taylor, and subsequently to 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 own products intended for the East. The makers thus found associated are Francis Perigal, Peter Upjohn, H. Story, Borrell, John Johnson, Louis Recordon and Dupont. All were reputable watchmakers in their own right, selling other products under their own names.