Jaeger-lecoultre, Master Series, Model: Q1656450 Tourbillon 41.5mm Automatic mechanical Platinum material • Material specification: PT950 platinum case, 41.5mm diameter, black original factory alligator leather strap, limited to 300 pieces worldwide, a rare model • Movement configuration: Jaeger-lecoultre self-winding tourbillon movement, regular hands (Regulateur) hour, minute and second separation layout, power reserve approximately 45 hours, 30-meter water resistance for daily use • Market layout: 12 o 'clock small dial: Independent minute display Dial central axis: Hour hand track 6 o 'clock window opening: 1 minute exposed tourbillon mechanism (brand core complex craftsmanship) Bezel ring scale: 31-digit Gregorian calendar date display on the outer ring Design and craftsmanship highlights Standardized pointer design: Retro railway clocking hour, minute and second separation dial, inspired by the design of 19th-century observatory pocket watches, with extremely high recognition Exposed Tourbillon: The 6 o 'clock openwork window allows for a direct view of the tourbillon escapement's operation. The movement plates are hand-polished with large areas of fish-scale patterns and Geneva stripes Platinum material: PT950 platinum, a precious metal, has better weight and oxidation resistance than stainless steel and is a standard material for high-end collectible watches