Page 17 of Collection Octa by F.P.Journe

octa calendrier the annual calendar is the third complication to be integrated within the octa automatic winding calibre defined as the first automatic winding movement to ensure a minimum power-reserve of 120 hours five days enabling extremely precise time measurement even when not worn the originality of each of the octa complications is imposed by an identical mainplate for all models within the octa collection the mechanism must adapt to the milling and drilling required for other complications and must also be inserted within a thickness of just 1 millimetre once again françois-paul journe has achieved the feat of integrating within this five-day automatic calibre a complication as significant as an annual retrograde calendar while maintaining the dimensions of the mechanism at 30 mm in diameter and 5.7 mm thick the calendar which displays the day and month through two separate windows advances instantaneously and is self-adjusting for the months of 29 30 and 31 days the octa annual calendar automatically moves from month to month it only needs to be advanced manually at the end of february three years out of four for non leap-years the calendar must be moved from february 28th to 29th by a single turn of the crown and the calendar automatically moves from february 29th to march 1st 60

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