This replica GMT-Master 18239 arrives in a 41mm case with a black dial, presenting one of the less commonly seen reference numbers in the GMT-Master II family. The 18239 originally denoted a precious-metal GMT-Master with a specific bracelet and bezel configuration, and this version maintains that heritage with a clean black dial that prioritizes legibility over visual complexity. At 41mm it falls in line with the updated sizing seen across recent Rolex sport models, offering marginally more wrist presence than the traditional 40mm references.

Case & Movement Specs

• Case diameter: 41mm
• Dial: black with luminous hour markers
• Crystal: sapphire with Cyclops magnification
• Movement: automatic GMT caliber
• Functions: dual time zone, date at 3 o’clock
• Bezel: bi-directional with 24-hour scale

The black dial on the 18239 uses a matte finish that reduces glare under direct light. Hour markers are applied rather than printed, giving each index a three-dimensional presence visible from oblique angles. The 41mm case adds approximately 1mm of visual diameter over the 40mm standard, a subtle but perceptible increase on the wrist.

Caliber Breakdown

Inside, the automatic GMT movement allows independent adjustment of the local hour hand. This means crossing time zones only requires pulling the crown to position two and clicking the hour hand forward or backward in one-hour steps. The date tracks local time and advances automatically at midnight. For a wildly different aesthetic from the same collection, compare this black-dial reference against the 126710BLRO Pepsi, which shares the core GMT architecture but wraps it in the most colorful bezel available. Both reside in the GMT-Master catalog, yet they attract very different buyers.

How It Compares

The 18239 occupies a quieter position in the GMT-Master range compared to the Pepsi, Batman, and Sprite variants that dominate most conversations. A black dial with a standard bezel means this reference does not rely on color to make its case. Instead, it appeals to buyers who value the gmt master complication for its function rather than its visual identity. Paired with a suit or worn with weekend wear, the neutral palette disappears into any context without friction. This replica GMT-Master 18239 delivers that low-profile functionality in a slightly larger 41mm package.