Montblanc MB 29.21

Patented ExoTourbillon movement with automatic winding via micro-rotor. The ExoTourbillon features a large 9.7mm screw balance positioned outside the tourbillon cage, saving 30% energy compared to conventional tourbillons. The 18-screw balance includes 4 adjustable gold screws for precision regulation. Quick stop-second mechanism directly halts the balance for precise time setting. Crown position gauge on dial shows winding vs time-setting modes. Certified by Montblanc Laboratory Test 500 Hours.