Excellent Swiss watch made for the Turkisch market Circa 1850

Gold portrait watch of Sultan Abd-ul-Mejid 
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An excellent Swiss 18 carat gold and painted on enamel hunting cased pocket watch, circa 1850. Made for the Turkish market. A foliate engraved case, the front cover with a finely painted enamel portrait of Sultan Abd-ul-Mejid (1823-1861) against an engine turned background, the back cover decorated with an engraved and black enamel view of the Hagia Sophia mosque in Constantinople. Hinged gold cuvette with engine turned border. White enamel dial with radial Islamic numerals, outer minute track and gold hands with pierced black tips. Matte gilt movement, the unusual calibre with pierced scroll backplate, jewelled to the third, lateral lever escapement with curled counterpoise, cut bimetallic compensation balance, flat balance spring, index regulator. Cuvette engraved Demi Chronometre.
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Diameter: 49 mm
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Signed: No Name