Swiss 18 Carat gold and enamel neo classic pocket watch Circa 1920

Gold keyless lever watch by Patek Philippe
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A fine Swiss 18 Carat yellow gold and enamel open faced neo classic lever pocket watch, circa 1920. Ultra thin, rhodium plated movement with Geneva striping, 18 jewels, going barrel, straight line equilibrated lever escapement, keyless winding, compensated balance, blued steel hairspring with a terminal curve, eight adjustments.
Champagne coloured dial with Greek style Arabic numerals, outer minutes track, subsidiary seconds at six o’clock and blued steel hands. Round shaped polished case, the back black champlevé enamel, with a decor of arabesques in ramolayé technique probably by L. Mayland, Geneva. D
ial and case signed, movement signed and numbered.
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Diameter: 45 mm
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Weight: 60 g
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Signed: Patek Philippe & Cie Geneva-Switzerland
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In the 1920’s, Patek Philippe produced some dress watches of which the cases were made using the ramolayé technique. The enamel background is black or blue decorated in gold. The production books of the manufactory mention that these works were entrusted to a craftsman enameller L. Mayland, Geneva. A few examples are today kept in the Patek Philippe Museum in Geneva. Another Patek Philippe dress watch representing a ‘Griffon’ is known. The case back is made with a mixture of more complex techniques, using the champlevé technique imitating the cloisonné work and the painting on enamel.
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Arabesques: Arabesque is originally an architectural term used for decorations with a graceful intertwining of leaves, flowers, animals and other figures in Arabic style. 
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Ramolayé-technique: A technique that is often used in jewelry, because it allows the creation of small patterns. The maker uses chisels. It is a technique that gives the piece a matte appearance.
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The clear enamel layer on the back is restored with soft enamel.
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Reference 0075000