Adding a moon phase to the 39mm Ultra Thin Master platform, this replica ultra thin master black 39mm reference Q1368470 brings celestial tracking to a dress watch case. The black dial provides high contrast for the moon phase aperture at six o’clock, where a gold moon disc moves against a dark sky backdrop. Dauphine hands and applied indices keep the rest of the face minimal, letting the complication speak for itself. At 39mm in stainless steel the proportions stay conservative, which suits the formal intent of this layout.

Technical Overview

• Reference: Q1368470
• Case diameter: 39mm
• Case material: stainless steel
• Dial: black with moon phase at six o’clock
• Crystal: sapphire with anti-reflective coating
• Functions: hours, minutes, seconds, date, moon phase
• Movement: automatic
• Strap: black leather

Moon phase complications require a 59-tooth gear that advances the disc once every 24 hours and 50 minutes. The accuracy of this cycle means the display drifts by roughly one day every two and a half years.

Inside the Movement

The automatic caliber driving this Q1368470 handles both the date and moon phase through a single gear train extension. Moon phase is one of the oldest horological complications, predating the chronograph by centuries, and Jaeger-LeCoultre has offered it in various forms since the early twentieth century. On a black dial the gold moon disc creates a striking visual focal point that darker strap choices amplify even further. For more options within this range, visit our Ultra Thin Master collection. The 1362511 time-only reference shares the same 39mm case but drops the moon phase, which may suit anyone who prefers a cleaner dial.

What Sets It Apart

Among 39mm moon phase watches, few manage to keep the overall thickness as restrained as this one does. The black dial amplifies the visual effect of the complication, giving it a presence that lighter dials cannot match. This replica ultra thin master black 39mm moon phase reference puts a centuries-old complication into a genuinely slim modern package.