Swiss gold lever watch with one minute tourbillon Circa 1860

Gold full hunter with one minute tourbillon
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A rare Swiss 18 carat gold hunting cased lever pocket watch with one minute tourbillon, circa 1860. Delivered to Lewis Ladomus & Cie, Philadelphia.
Bridge movement, chain/fusee, gold screwed compensation balance, lever escapement.
White enamel dial Roman numerals. Engine turned case.
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Diameter: 53 mm
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Weight: 150 g
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Signed: No name
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The movement of this tourbillon was produced in Switzerland in the second half of the 19th century and subsequently updated with various escapements and different types of cages here we have a rotation cage after the design by Girard-Perregaux. It is an elaborate construction on a mirror polished base plate. The movement is in supreme condition with an allover gilded and granulated surface that includes the barrel and the fusee. The dial is immaculate. A protection device was fitted between the barrel and the tourbillon cage, intended to protect the delicate cage in case of a breaking chain. Lewis Ladomus in Philadelphia, Pennsylvania, was a maker and retailer of jewellery and watches around 1840 and 1880.