The Jaeger-LeCoultre Master Eight Days Perpetual Calendar (Reference Q1612420) is an 18k rose gold timepiece characterized by its rare combination of a perpetual calendar and an extensive 8-day power reserve.

• Case: 40mm diameter and approximately 12mm thickness, crafted from solid 18k rose gold with a polished finish.

• Movement: In-house manual-winding Caliber 876-440B. It utilizes twin barrels to achieve a 192-hour (8-day) power reserve.

• Dial: Eggshell or ivory-colored dial featuring applied rose gold hour markers and dauphine hands.

• Water Resistance: Rated at 50 meters. 

• Perpetual Calendar: Automatically adjusts for months of different lengths and leap years until the year 2100.

• Display: Includes sub-dials for day, date, and month, plus a full four-digit year window between 7 and 8 o'clock.

• Moonphase: Located within the day sub-dial at the 9 o'clock position.

• Safety Indicator: Features a small window (Red/White) in the center of the day/night indicator. A RED zone (typically 9 PM to 3 AM) warns the user not to adjust the calendar to avoid damaging the movement.