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Service and Restoration of a 1980s Rolex GMT Master Pepsi with Cal.1570 Movement

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In the video titled “Service and Restoration of a 1980s Rolex GMT Master Pepsi with Cal.1570 Movement,” the Watch Repair Channel takes us through the journey of servicing and restoring a vintage Rolex watch. Purchased in 1981, this particular timepiece has undergone multiple services and replacements over the years. The video showcases the meticulous process of inspecting, disassembling, cleaning, and reassembling the watch movement, providing an in-depth look at the inner workings of this iconic timepiece. Throughout the video, the Watch Repair Channel emphasizes that the methods shown may not be official Rolex methods, but they do align with general watch-repairing principles. Despite the cosmetic damage, the watch’s performance is improved, leaving viewers with a renewed appreciation for this classic piece of horological craftsmanship.

Service and Restoration of a 1980s Rolex GMT Master Pepsi with Cal.1570 Movement

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Initial overview and introduction of the watch

You have recently acquired a vintage Rolex GMT Master Pepsi from the 1980s, and you couldn’t be more thrilled. This iconic timepiece holds a special place in horological history and is highly sought after by collectors and enthusiasts alike. The GMT Master Pepsi derives its name from its distinctive red and blue bezel, reminiscent of the colors of the Pepsi logo. The watch features a Caliber 1570 movement, known for its precision and durability. Before embarking on the restoration journey, it is essential to gain a deeper understanding of the watch’s history and previous services.

History and background of the watch

The Rolex GMT Master Pepsi was first introduced in the 1950s as a tool watch specifically designed for airline pilots. Its main feature, the 24-hour GMT hand, allowed pilots to accurately track multiple time zones while in flight. Over the years, the GMT Master Pepsi underwent various design changes and improvements. The 1980s version, like the one you own, features a robust stainless steel case, a bi-directional rotating bezel, and a scratch-resistant sapphire crystal. This timepiece represents a significant era in Rolex’s rich heritage and continues to captivate watch enthusiasts with its timeless design.

Service and Restoration of a 1980s Rolex GMT Master Pepsi with Cal.1570 Movement

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Previous services and repairs

Before embarking on restoring your Rolex GMT Master Pepsi, it is crucial to gather information about any previous services or repairs the watch might have undergone. If you purchased the timepiece from a reputable dealer or collector, they might have provided you with a service history. However, if this information is unavailable, it is recommended to consult a professional watchmaker who can carefully inspect the watch for any signs of past interventions. Understanding the watch’s previous service history allows for a better evaluation of its current condition and helps identify any potential issues that need addressing during the restoration process.

The video and its purpose

To document and share the journey of restoring your Rolex GMT Master Pepsi, you decide to create a video. The purpose of this video is to not only chronicle the step-by-step process of servicing and restoring the watch but also to provide a valuable resource for fellow watch enthusiasts who may be interested in similar projects. By leveraging the power of visuals and narration, you aim to deliver an engaging and informative experience that allows viewers to learn more about their timepieces and gain insights into the intricate world of watchmaking.

Service and Restoration of a 1980s Rolex GMT Master Pepsi with Cal.1570 Movement

Inspecting the watch movement

Once you have gathered all the necessary information about the watch’s history and previous services, it is time to dive into inspecting its movement. The movement is the mechanical heart of the watch that drives its timekeeping functions. Carefully removing the case back, you examine the Caliber 1570 movement, searching for any signs of wear, damage, or dirt buildup. This initial inspection helps determine the level of servicing required and allows you to identify any potential issues that may need addressing during the restoration process.

Dismantling the watch movement

With the initial inspection complete, it is time to proceed with dismantling the watch movement. This delicate process involves removing various components, including the self-winding mechanism, the balance wheel, the escapement, and the various gears and springs. Each part must be handled with precise care and attention to detail to avoid any damage. As you carefully disassemble the movement, you take note of any worn or damaged components that will require replacement during the restoration.

Service and Restoration of a 1980s Rolex GMT Master Pepsi with Cal.1570 Movement

Cleaning the watch movement components

With the watch movement disassembled, the next step is to thoroughly clean each individual component. Dirt, dust, and oil residues can accumulate over time, hindering the movement’s performance and compromising its accuracy. Using specially formulated cleaning solutions and ultrasonic cleaners, you meticulously clean each part, ensuring that all dirt and debris are completely removed. This essential cleaning process restores the components to their optimal working condition and prepares them for reassembling.

Reassembling the watch movement

After the cleaning process, it is time to start reassembling the watch movement. This intricate task requires careful attention to detail and a thorough understanding of the movement’s anatomy. Each component must be correctly positioned and secured, ensuring smooth and precise operation. As you carefully rebuild the movement, you keep an eye out for any signs of misalignment or improper seating. This meticulous phase of the restoration process requires patience and precision to ensure the movement’s long-term performance and reliability.

Service and Restoration of a 1980s Rolex GMT Master Pepsi with Cal.1570 Movement

Adjusting the timing screws on the balance wheel

One of the critical steps in restoring a mechanical watch movement is adjusting the timing screws on the balance wheel. The balance wheel is responsible for regulating the watch’s accuracy by controlling the oscillations of the movement. By delicately tightening or loosening the timing screws, you can fine-tune the balance wheel’s behavior and improve the watch’s timekeeping capabilities. This adjustment process requires exceptional skill and a keen sense of precision to achieve optimal timing performance.

Final testing and performance evaluation

With the movement reassembled and the timing adjusted, it is time to subject the watch to a battery of tests to evaluate its performance. These tests include assessing its accuracy against a time reference, evaluating its power reserve, and examining the functionality of additional features such as the date or GMT complications. By conducting these tests, you ensure that the watch is operating within its intended parameters and meets the high standards expected of a Rolex timepiece.


The restoration journey of a vintage Rolex GMT Master Pepsi with a Caliber 1570 movement is a labor of love and dedication. By carefully inspecting, disassembling, cleaning, and reassembling the watch movement, you can breathe new life into this horological icon. The final testing and adjustment phases ensure that the watch not only performs accurately but also preserves its historical value and charm. Restoring a watch of this caliber requires a deep appreciation for its heritage, a meticulous attention to detail, and the skills of a competent watchmaker. With the restoration complete, you can enjoy your revived Rolex GMT Master Pepsi, confident in its timeless allure and enduring craftsmanship.

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