English verge watch made for the Islamic market Circa 1815

Gold and enamel triple-cased repeater
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A very fine and rare English 18K gold and enamel triple-cased quarter repeating verge pocket watch made for the Islamic market, circa 1815. On The Bosphorus scene by Markwick Markham & Perigal.
Frosted gilt full plate movement, baluster pillars, fusee and chain, verge escapement, steel balance wheel, pierced and chased foliate cock with diamond endstone, gilt dust ring, repeating on a later bell activated by depressing the pendant.
White enamel dial with Islamic numerals, outer minute track, gold beetle & poker hands. The outer case with glazed back, scalloped edges, the bezels decorated with pale blue, green, red and white enamel and pierced stylized flower heads, the middle case also scalloped, pierced bezel decorated with green, blue, red and white enamel, the back with polychrome painted harbour scene with fully-rigged ships and lighthouse under an opalescent sky, red translucent enamel and pierced border decorated to match the bezel, the inner case with a hinged polished bezel, foliate pierced band, centred with a rosette, faux London hallmarks. Dial and movement signed.
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Diameter: 48 mm
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Signed: Markwick Markham & Perigal London
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The trading name of Markwick Markham 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 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 names.
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Francis Perigal (also Perrigal) was active from about 1770 to the time of his death in 1794. He was admitted as an honorary freeman of the Clockmakers’ Company in 1781. A maker of fine and interesting watches, he made a very early lever watch which, having been re-cased, can only be dated by the signature: “Watchmaker to the King”. This appointment was conferred upon him in 1784. Little is known of Perigal, but the few surviving watches bearing his name are of considerable mechanical interest and of fine quality. He was succeeded in business by his son.