Rare Swiss gold and enamel watch with portrait Circa 1900

Gold and enamel watch with noble portrait made for the Turkish market
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A Swiss rare 14k gold and enamel keyless lever watch with noble portrait made for the Turkish market, circa 1900, nickel lever movement, cut bimetallic balance, jewelled to the centre, micrometer regulator.
Silvered dial, Arabic numerals, subsidiary seconds, gold case with leaf laurel decoration to both bezels, a polychrome enamelled portrait of Prince Sehzade Yusuf Izzeddin Effendi on the back, case numbered.
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Diameter: 45 mm
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Signed: No name
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Prince Sehzade Yusuf Izzeddin Effendi (October 10, 1857 – February 1, 1916) was the Son of Sultan Abdul Aziz and the Crown Prince of the Ottoman Empire from 1909 until his death. Prince Yusuf lived in obscurity from the time of his father’s death in 1876 until the dethronement of his cousin, Sultan Abdul Amid II in 1909. Under the Turkish constitution, Yusuf, the oldest Ottoman prince, became heir to his cousin, Mehmed V. Considered a modernizer and reformer, he apparently committed suicide on 1 February 1916. It was suspected at the time that he might have been murdered at the connivance of the powerful Minister of War, Enver Pasha, with whom he had clashed.