Jacob & Co. JCAA05

The JCAA05 is Jacob & Co.'s skeletonized automatic chronograph caliber developed in partnership with Concepto, based on the ETA 7750. This bi-compax column wheel chronograph features a vertically-positioned balance wheel visible from the dial side and an open-worked barrel. The movement powers the Epic X Chrono collection with 260 components, displaying hours, minutes, small seconds at 9 o'clock, and a 30-minute chronograph counter at 3 o'clock. The distinctive skeleton design allows full visibility through the tinted crystal dial and smoked sapphire caseback, with the column wheel mechanism visible from the reverse.