Jaeger LeCoultre Master Calendar, Q4148420, stainless steel case on a strap with a matching stainless steel double folding deployant clasp, automatic JLC caliber 866AA movement, 70-hour power reserve, silver sunray dial with applied hour markers and luminous dots, date display around the outer chapter ring with a new jumping feature in between the 15th and 16th to ensure that the hand never blocks the moonphase, day and month windows, moonphase with small seconds at 6 o'clock, sapphire crystal, display back, water resistant to 50 meters. Diameter: 40mm, Thickness: 10.9mm. Excellent with Jaeger LeCoultre box and papers dated 2022