Audemars Piguet Jules Audemars Tourbllion Chronograph. Platinum case. Dial: Open-worked with a silvered 30-minute counter, engraved small seconds counter, blued steel hands. Bracelet - Hand-stitched large square scale crocodile with 950 platinum AP folding clasp . Functions:Tourbillon , chronograph, hours, minutes, small seconds. Type of balance: With Variable inertia screws. Frequency of balance wheel:3,00 (=21'600 alternances/hour) Hz. Type of balance-spring. Balance-spring type:Breguet. Number of jewels:28. Power reserve:72 hours. Skeleton movement - Integrated Chronograph movement. Column wheel . Chronograph mechanism: 30-minute counter. Manual finishing on both bridges and mainplate. Manual finishing of the cut out parts (polished bevels, grained finishing on top and Matte "brouillé" finishing underneath). Tourbillon, Chronograph / Minutes counter / Seconds counter. Water-resistant to 20 meters / 65 feet.