Swiss 18k gold open faced keyless lever watch Circa 1911

Gold lever by Patek Philippe
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A pink gold open faced keyless watch, retailed by gondola & labouring, Rio de Janeiro, circa 1911. Jewelled gilt lever movement, wolf tooth winding, moustache escapement, cam-wheel regulation, 18k pink gold cuvette, white enamel dial, Roman numerals, outer minute track, subsidiary seconds, 18k pink gold case, engine-turned back, case, dial, movement signed, cuvette signed and numbered.
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Diameter: 53, 5 mm
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Signed: Patek Philippe & Co Genève
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With a Patek Philippe Certificate of Origin, presentation box, an Extract from the Archives and a spare hairspring. Watches made by Patek Philippe for the illustrious Brazilian firm of Gondolo & Labouriau are prized as some of the best examples of high-quality watches from the turn of the last century. Watches made for Gondolo are characterized by movements bearing cam-wheel regulators and 9k gold gear train wheels. The present example is of particular note as it bears all of the original accompaniments that would have been sold with it in Rio de Janeiro over a century ago.