Tourbillon, chronograph, hours, minutes Total diameter 15 mm Type of balance With Variable inertia screws Frequency of balance wheel 3,00 (=21'600 alternances/hour) Hz Type of balance-spring stud-holder Mobile stud Balance-spring type Breguet Number of jewels 30 Power reserve 237 h Number of parts 328 SPECIFICITIES Integrated Chronograph movement Column wheel Chronograph mechanism 30-minute counter Shockproof system to ensure the chrono-timing precision Locking gear Stopwork Twin barrels in parallel Anodised Aluminum bridges Manual finishing on both bridges and mainplate Manual finishing of the cut out parts (polished bevels, grained finishing on top and Matt "brouill" finishing underneath) TOURBILLON Chronograph / Minutes counter / Seconds counter