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2021 Rolex GMT-Master II Batman Oyster Bracelet 126710BLNR Rolex Watch Review

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The 2021 Rolex GMT-Master II Batman Oyster Bracelet 126710BLNR has become one of the most highly anticipated Rolex watches of the year. This model features the iconic black and blue bezel paired with the beloved oyster bracelet. With a 40mm stainless steel case, a black dial, and a stainless steel Oyster bracelet, this timepiece exudes a sense of elegance and sophistication. It offers a range of features, including hours, minutes, seconds, date, and GMT functions. The watch measures 12.1mm in thickness and 48.1mm from lug-to-lug, making it a versatile and comfortable option for any wrist size. For more details on the 2021 Rolex GMT-Master II Batman, watch the full review by Tim Mosso!

In this review, Tim Mosso highlights the key features and design elements of the 2021 Rolex GMT-Master II Batman. He discusses the reunion of the black and blue bezel with the oyster bracelet, capturing the attention of watch enthusiasts. With its sturdy construction and high-quality materials, including the 904L steel case and bracelet, this watch offers a sense of durability and luxury. The watch also boasts technological superiority, with a dual time function, a 24-hour bi-directional rotating bezel, and a scratch-resistant cerachrom ceramic insert. Overall, the 2021 Rolex GMT-Master II Batman is a highly coveted timepiece that combines timeless design with impressive functionality.


The Rolex GMT-Master II is an iconic timepiece that has been highly regarded for its precision, durability, and functionality. Designed for professional aviators and travelers, the GMT-Master II features a dual time zone function, allowing you to keep track of time in two different locations simultaneously. In this comprehensive article, we will delve into the specifications, design, functionality, movement, and overall overview of the Rolex GMT-Master II.


Model and SKU

The Rolex GMT-Master II is available in several different models, each identified by a unique SKU. These SKUs differentiate the various materials, colors, and special editions that Rolex offers. Some of the popular models include the GMT-Master II with a stainless steel case and bracelet, the GMT-Master II with a two-tone gold and stainless steel combination, and the GMT-Master II with a full gold case and bracelet.

Case Size and Thickness

The case size of the GMT-Master II measures 40mm in diameter, which is considered as a versatile size that suits both men and women. The thickness of the case is approximately 12.2mm, providing a sleek and comfortable fit on the wrist.

Bracelet and Lug Size

The GMT-Master II is fitted with the iconic Oyster bracelet, which is known for its reliability and robustness. The bracelet is crafted from either stainless steel, two-tone gold and stainless steel, or solid gold, depending on the model. The lug size of the bracelet measures 20mm, ensuring a secure and comfortable fit.

Water Resistance

The GMT-Master II boasts a remarkable water resistance of up to 100 meters (330 feet). This level of water resistance makes it suitable for everyday wear and also provides peace of mind when engaging in water-related activities.

Materials Used

Rolex is renowned for its use of high-quality materials, and the GMT-Master II is no exception. The case and bracelet are typically made from durable and corrosion-resistant 904L stainless steel, ensuring longevity and a polished appearance. In some models, Rolex incorporates gold elements, such as the bezel or center links of the bracelet, adding a touch of luxury. The crystal on the GMT-Master II is made from scratch-resistant sapphire, providing excellent visibility and durability.

2021 Rolex GMT-Master II Batman Oyster Bracelet 126710BLNR  Rolex Watch Review


Oyster Bracelet

The Oyster bracelet is a signature feature of Rolex watches, including the GMT-Master II. It is known for its reliability, comfort, and timeless aesthetic. Crafted with solid links and an Oysterlock clasp, the bracelet guarantees a secure fit on the wrist, even during active movements. The Oysterlock clasp features Rolex’s patented Easylink extension system, allowing for adjustments in length of up to 5mm without the need for tools.

Super Case

The GMT-Master II is equipped with Rolex’s Super Case, a design feature that enhances both the aesthetic appeal and practicality of the watch. The Super Case refers to the watch’s larger and bolder appearance compared to its predecessor, the GMT-Master. The broader lugs and wider crown guards give the watch a more substantial feel on the wrist while ensuring enhanced robustness.

Ceramic Bezel

Rolex introduced the Cerachrom ceramic bezel in the GMT-Master II, replacing the previous aluminum bezel insert. The ceramic material is highly resistant to scratches, fading, and corrosion, ensuring the longevity of the watch’s appearance. The Cerachrom bezel also features a two-color design, making it easy to distinguish between day and night time zones.

Dial and Hands

The GMT-Master II showcases a variety of dial options, including black, blue, and green, each providing a distinct and vibrant look. The dial features luminous hour markers and hands, allowing for excellent legibility in various lighting conditions. The Mercedes hands, with their unique shape, are an iconic characteristic of the GMT-Master II, along with the distinctive red GMT hand.


Dual Time Zones

The primary functionality of the GMT-Master II is its ability to display two time zones simultaneously. This feature is especially useful for frequent travelers who need to keep track of their local time and a reference time. The local time is indicated by the traditional hour, minute, and second hands, while the reference time is shown on the additional GMT hand.

GMT Offset

With the GMT-Master II, the GMT hand can be adjusted in one-hour increments to display a different time zone. This GMT offset function allows for easy and quick adjustment when traveling to different time zones, without affecting the accuracy of the watch’s movement.

Hacking Seconds

The GMT-Master II incorporates a hacking seconds function, which enables the wearer to stop the second hand to set the time precisely. This feature proves particularly useful when syncing the watch with another time source or when needing to ensure accurate timekeeping.

Power Reserve

The GMT-Master II is equipped with a self-winding mechanical movement that relies on the wearer’s wrist movements to power the watch. When fully wound, the movement has an approximate power reserve of 72 hours, providing ample time for the watch to continue operating even when not being worn.


Rolex is known for its exceptional accuracy, and the GMT-Master II upholds this reputation. The movement within the watch undergoes rigorous testing and precision adjustments to meet Rolex’s strict standards, resulting in precise timekeeping. The GMT-Master II typically achieves a deviation of +/- 2 seconds per day, showcasing its highly accurate nature.


Rolex’s Chronergy Escapement

The GMT-Master II is powered by Rolex’s in-house caliber, which incorporates the patented Chronergy escapement. The Chronergy escapement is highly efficient, with improved energy transfer and increased resistance to magnetic fields, resulting in a more reliable and precise movement. The escapement boasts a skeletonized design, allowing for better visibility of its intricate mechanics.

Paraflex Shock Protection

To ensure maximum durability and resistance to shocks, Rolex integrates its patented Paraflex shock absorption system into the GMT-Master II’s movement. The Paraflex system enhances the watch’s reliability by providing increased protection against impact and vibrations, preserving the accuracy of the movement.

Balance Bridge

The GMT-Master II features a balance bridge, a mechanism that supports the balance wheel and reduces any potential disturbance to its oscillations. This design element enhances the stability and precision of the movement, contributing to the watch’s accurate timekeeping.

Handmade Hairspring

Rolex is one of the few watch manufacturers that still produces its hairsprings in-house. The GMT-Master II’s movement incorporates a handmade hairspring, crafted from a special alloy. This proprietary hairspring ensures optimal performance, consistency, and longevity, contributing to the watch’s overall precision.


The Rolex GMT-Master II is a timepiece that combines exceptional functionality, design, and craftsmanship. Its dual time zone feature, along with its reliable movement, makes it a sought-after watch for travelers and professionals who require accurate timekeeping in different locations. With its robust construction, luxurious materials, and attention to detail, the GMT-Master II represents the epitome of Rolex’s commitment to excellence. Whether for practical use or as a symbol of status, the GMT-Master II is a valuable and reliable companion for the discerning watch enthusiast.

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