Swiss chronometer with split seconds chronograph Circa 1888

Gold hunting cased pocket watch by Audemars Piguet
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A very rare Audemars Piguet Ankerchronomter with split seconds chronograph, circa 1888. It is the earliest known Audemars Piguet caliber of this type, no. 3331 from 1888, with expert report from Philip Poniz.
18 carat pink gold smooth case. Very rare caliber “Audemars Piguet Ankerchronometer no. 3331” with screwed gold chatons, eccentric fine adjusting device, big balance with gold screws, lever escapement, Geneva striping and signed and numbered. Signed white enamel dial with 1/4 seconds register, 20 min register, subsidiary dial for the constant seconds, subsidiary dial for the 30min counter, split seconds chronograph and blued steel hands.
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Diameter: 51 mm
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Weight: 130 g
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Signed: Audemars Piguet & Co
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According to the report, this watch is a museum object, because even the collection of the Audemars Piguet Museum has not a watch with this early Audemars Piguet caliber, only an archive photo (No. 2979). According to expert opinion of Philip Poniz, one of the most respected pocket watch experts in the world, Sotheby’s and Antiquorum expert, the watch is the only known exemplar of its kind, made for the American market, sold in 1888. Philip Poniz has been working for about 30 years for the most important auction houses and museums as experts and reviewers for pocket watches.