Rare Swiss 18K rose gold jump hour lever watch Circa 1889

Rose gold jumping hour watch by Patek Philippe
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A rare Swiss 18 carat rose gold open-faced jump hour lever pocket watch, circa 1889. Retailed by Bailey, Banks & Biddle, Philadelphia, Pennsylvania. Sold on November 3, 1890. Special lever movement, jewelled. White enamel dial with Arabic numerals, jumping hour aperture and subsidiary seconds. Plain case. Case and movement numbered and signed by the retailer. Comes with an Extract from the Archives confirming that the movement and dial were originally sold without a case.
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Diameter: 50 mm
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Signed: Bailey, Banks & Biddle Philadelphia Special
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This piece belongs to an extremely rare group of jumping hour watches made by Patek Philippe. Jumping hour watches, both pocket and wristwatches, were made in notably small numbers, and often only by special order.
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The present watch was made especially for the prominent Philadelphia retailer, Bailey, Banks & Biddle originally founded in 1832.
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Jumping hour pocket watches first appeared in the early 19th century and came into fashion during the Art Deco period. The visually unique, clean and simplistic dial configuration matched perfectly with the Deco style defined by ultra-modern, sleek and polished finishes.