Wristwatch: very early Audemars Piguet rattrapante chronograph, ca. 1926–1929

Ca. Ø46mm, 18K gold, coat of arms engraved on the back, case and movement bear the same number 37518, early lugs, lower lug showing signs of repair, hinged case back, case, movement and dial signed, very fine calibre with 22 jewels and fine adjustment, dial with Breguet numerals, 30-minute counter, gold hands, leather strap, in working order and very well preserved. The earliest wristwatch split-seconds chronograph was produced by Patek Philippe as a one-off in 1923, with series production commencing in 1927. Based on its reference number, this Audemars Piguet chronograph was manufactured between 1926 and 1929, making it one of the earliest wristwatch split-seconds chronographs. In some cases, pocket watches were modified to create early chronographs. This is likely a one-off piece made to a customer’s specification with a modified case. Audemars Piguet did not produce any wristwatches with split-seconds chronographs in series production at that time.

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