Traditionnelle Twin Beat Perpetual Calendar, 42mm platinum (original 65-day generation, superseded by the 70-day 2026 update)

“Twin Beat”

The Traditionnelle Twin Beat Perpetual Calendar houses the patent-pending Caliber 3610 QP, a manual-wind movement that can switch between a 5Hz 'Active' rate for daily wear and a 1.2Hz 'Standby' rate that stretches the power reserve to roughly 65 days when set aside -- a pusher at 8 o'clock toggles…