Development Story
The Design and Engineering Behind
the Neo-Classic Look
The 2500 Series is more than just another addition to the G-SHOCK lineup. It was conceived to become a new mainstay alongside iconic styles such as the 5000, 6900, 110, and 2100. These neo-classic timepieces carry forward the heritage of the original DW-5000C, reimagining its classic appeal in a contemporary, fully analog design.
Why did we create the 2500 Series?
G-SHOCK watches started out digital, and later, analog-digital combination models were added, attracting an increasingly broad range of fans.
In recent years, however, more people have begun choosing products for their fundamental, lasting value rather than novelty or passing trends. This shift is also evident in watches, with growing appreciation for the simple act of reading time rather than making use of multiple functions, as well as for the ideas and stories behind each product.
In response to these changing values, we took a fresh look at the original DW-5000C. We came to believe that the essence of a G-SHOCK lies not in the digital display itself, but in the philosophy of retaining only what is essential, the commitment to pursuing toughness, and the aesthetic that emerges from function.
With this in mind, we set out to bring the principles that have long defined G-SHOCK to life in a simple analog watch, without a digital display.
For a brand that always continues to evolve, simply creating an analog version was not enough. Drawing on advanced digital technology, the development team set out to explore new possibilities in analog watchmaking. The project was also an opportunity to push the boundaries of G-SHOCK itself.
At the heart of the project was the development of an entirely new movement capable of providing functions commonly found in digital watches, but via analog displays. These include a disc-based stopwatch display and a fully automatic calendar. Completing this movement was a major driving force behind the creation of the 2500 series.
With a neo-classic look designed to be worn and cherished for years, regardless of age, gender, or personal style, the 2500 series reflects our ambition to create a new standard in watches for people who value timeless qualities.
Below, we take a closer look at the thought and attention to detail that went into the design and engineering of the 2500 series.
The design draws inspiration from the DW-5000C, the very first G-SHOCK. The octagonal bezel, the distinctive shape of the glass with horizontal top and bottom edges, and the refined functional beauty served as starting points. Building on this design heritage, the development team set out to create an entirely new design that would stand on its own as a fully analog watch.
The design concept, “Depth in Shadow,” brings this vision to life. A small seconds subdial at 9 o’clock and a Multi-Mission Date display at 3 o’clock create a distinctive two-eye layout on the clean, fully analog dial. Careful attention to the depth of the recessed subdial, the shape of the date window, and the varying heights of the indexes and minute markers creates a sense of depth with the striking contrast of light and shadow.
The interplay of light and shadow also helps bring the dial details into relief. The hour and minute hands are enlarged to make the time easy to read at a glance. Their tails are shorter than usual to minimize overlap with the subdial, while the overall hand design helps maintain clear visibility of both the subdial and date window.
The small seconds subdial at 9 o’clock embodies the design philosophy of the 2500 series. The question of how to represent seconds, the fundamental unit of time, led to the creation of a separate subdial dedicated to this purpose. The tail of the seconds hand features a motif inspired by the Shock Resist mark, a symbol of G-SHOCK heritage. With each passing second, the hand moves like a heartbeat, serving as a visual reminder of the watch’s enduring shock resistance.
Another key feature of the 2500 series is its compact proportions, achieved by integrating technology and design while maintaining the performance expected of a G-SHOCK. To make the watches comfortable and natural to wear in a variety of settings, careful attention was paid to every detail, from the overall dimensions and the diameters of the bezel and glass to the stepped surfaces and the lines flowing from the lugs into the band. The result is a well-balanced design that looks compact on the wrist.
While preserving the traditional octagonal design, the case was designed to feel like a natural extension of the wrist. Its taut, sculpted curves evoke the shapes of helmets and armor, for a kind of hard exoskeleton. The design combines a low center of gravity and a solid, rigid structure with a lightweight construction suited to quick movements. The flowing curves of the unibody case create a rich interplay of light and shadow.
Another defining feature of the 2500 series is the distinct finishes used for the resin and metal-covered cases. Traditionally, a resin model would be developed first, followed by a metal version. With the 2500 series, however, both were developed simultaneously to offer a wider range of options, helping more people to find their own everyday standard.
The resin models feature gently softened edges for a lighter, more relaxed appearance, while the metal-covered models emphasize clean edges and polished surfaces for a sharper, more solid look. Although they share the same design concept, the different materials give each its own distinctive character. The goal was to help every owner find a watch that feels right for them.
The dial finishes also differ between the resin and metal-covered models. The resin-cased GAC-2500 features a resin dial that maintains its light, sporty appearance, with raised indexes and minute markers that provide both excellent readability and a sense of depth. The metal-covered GMC-2500, meanwhile, features a brass dial with sunray or honed finishes, giving it a more refined, subdued appearance and subtle variations in the way it catches the light.
To create the new fully analog watches, an entirely new movement was developed specifically for the 2500 series. Its components are arranged at high density, for a compact case that is comfortable to wear throughout the day. The movement is manufactured at Yamagata Casio, the “mother factory” of G-SHOCK, where a new production line has also been established, incorporating dedicated image recognition systems and sensing technology.
One of the key features of the new movement is the Multi-Mission Date, a first for G-SHOCK. By controlling the date wheel independently, this technology allows a single display to serve multiple functions.
The three-cell date window at 3 o’clock serves multiple purposes, showing the date, the selected mode, elapsed minutes on the stopwatch, and information for various settings. When the stopwatch is running, the small seconds subdial indicates the seconds, while the date window shows the minutes, allowing elapsed time of up to 30 minutes to be measured and displayed.
In addition, setting the year, month, and day with Multi-Mission Date enables a fully automatic calendar in a fully analog watch, eliminating the need for manual date correction at the end of each month, including in leap years.
Another key feature is the Magnetic Holding Structure used for the minute hand. Rather than being fixed directly to the shaft, the minute hand is held in place by magnetic force, allowing it to absorb and dissipate impacts effectively. This structure also makes it possible to use larger hands and offers greater design flexibility. In the 2500 series, these advantages are reflected in the well-balanced shape of the hands, which delivers excellent readability.
The small seconds hand at 9 o’clock also has a seconds-hand sleep function. The hand can be stopped when not needed, helping conserve battery power. While battery life is approximately two years under normal use, keeping the seconds hand stopped can help extend it to approximately five years.
