JL Master Ultra Thin Perpetual Calendar RG 114258J GR Factory Best Edition Blue Dial

After 3 years of research, GR Factory presents the Jaeger-LeCoultre Master Ultra Thin Perpetual Calendar, replicating the intricate 868 movement using an imported 9015 movement with full functionality identical to the original.

Key Features

1. Perpetual Calendar
   • 8 o’clock invisible pusher adjusts the month.
   • Calendar operates from 2024–2029, simplifying module replacement.
2. Date, Day, and Month
   • Date (3 o’clock): Adjust via crown’s first position (forward and reverse).
   • Day (9 o’clock): Adjust via crown’s second position (24-hour rotation).
   • Month (6 o’clock): Adjust using the 8 o’clock pusher with the included tool.
3. Warning Window
   • White: Safe to adjust the year.
   • Blue: Restricted adjustment zone to protect the movement.
4. Moon Phase
   • Located at 12 o’clock, completes a cycle every 30 days. Adjustable via the crown.

Design Highlights

• Case and Bezel: Precision CNC-crafted stainless steel, 39mm diameter, 10mm thickness.
• Dial: Raised indices, recessed subdials, and detailed windows replicate the original design.
• Hands: Dauphine-style hands, half-sandblasted, half-polished, with heat-treated steel blue hands.