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octa chronographe with the octa chronographe françois-paul journe is revolutionising the classical conception of a chronograph integrated within the octa automatic winding calibre measuring 30 mm in diameter and 5,7 mm in thickness the chronograph is housed in a space just 1 mm thick this space is also occupied by the concentric large date display discs to achieve such a performance françoispaul journe imagined flattening the usual column wheel to transform it into a cam wheel this means it is the profiled rim instead of the column which actions the chronograph levers a single sliding lever returns ...