English verge watch made for the Islamic market Circa 1815

Gold and enamel triple-cased watch 
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A very fine English 18K gold and enamel triple-cased verge pocket watch made for the Islamic market, circa 1813. River Landscape scene by Markwick Markham & Borrell.
Frosted gilt full-plate movement, pierced vases-shaped pillars, fusee and chain, verge escapement, steel balance wheel, foliate cock pierced and chased with initials, silver regulation dial.
White enamel dial with Islamic numerals and outer minute track, gold beetle hour hand. The outer case with scalloped edges, the bezels decorated with pale blue, green and white enamel and red flower heads, the back of the middle case with a painted-on enamel river landscape under an opalescent sky, bezel and border decorated to match the outer case, hinged, polished inner case, with faux London hallmarks. Dial and movement signed.
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Diameter: 33.5 mm
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Signed: Markwick Markham & Borrell London