Casio G-SHOCK 2500 Series Two Eye Analogue Watch (GAC-2500-9AER)

Overview

The Casio G-SHOCK GAC-2500-9A combines the legendary durability of G-SHOCK with a bold yellow colour scheme and an innovative approach to analogue timekeeping. Part of the contemporary 2500 Series, this distinctive watch reinterprets the functional design of the original DW-5000C through a modern octagonal case, a carefully engineered analogue display and striking monochromatic styling. Its vibrant yellow finish creates a confident, contemporary appearance while retaining the practical functionality and exceptional toughness associated with G-SHOCK.

Beneath its distinctive exterior, the GAC-2500-9A incorporates advanced engineering, including Casio's magnetic Shock Release Hand technology, a multifunction Multi-Mission Date display and a dedicated small seconds subdial. With shock-resistant construction, 200-metre water resistance, amber LED illumination and a lightweight 47 g design, it delivers dependable everyday performance in a compact, comfortable format. Bio-based resin components and a battery-saving seconds-hand sleep function further enhance its practicality.

Key Features

• Innovative G-SHOCK 2500 Series design inspired by the original DW-5000C
• Bold yellow colour scheme with matching case, dial and strap
• Distinctive analogue two-eye dial arrangement with contemporary styling
• Iconic octagonal bezel with compact, streamlined proportions
• Magnetic Shock Release Hand designed to absorb and dissipate impacts
• Shock-resistant construction for dependable everyday durability
• 200-metre water resistance for swimming and outdoor activities
• Multi-Mission Date system with multifunction three-cell display
• Dedicated small seconds subdial featuring the G-SHOCK Shock Resist motif
• Seconds-hand sleep function to help conserve battery power
• Three-dimensional resin dial with raised hour markers
• Amber LED illumination with afterglow for improved low-light visibility
• Neobrite luminous coating for easier time reading in darkness
• Elapsed-time stopwatch with an approximately 30-minute measuring capacity
• Full auto calendar programmed through to 2099
• Hand Shift function for an unobstructed view of the in-dial display
• Bio-based resin case components and flexible resin strap
• Lightweight 47 g construction with a compact 44.5 mm case width
• Approximately two-year battery life under normal operating conditions

Specifications

• Model: GAC-2500-9A
• Collection: G-SHOCK 2500 Series
• Display: Analogue with multifunction date display
• Case Dimensions: 46.7 × 44.5 × 12.7 mm
• Weight: 47 g
• Case & Bezel Material: Resin / bio-based resin
• Case Colour: Yellow
• Dial Colour: Yellow
• Strap: Yellow bio-based resin band
• Compatible Wrist Size: 145–215 mm
• Glass: Mineral glass
• Construction: Shock Resistant
• Water Resistance: 200 metres (20 bar)
• Movement: Analogue quartz
• Power Source: CR1025 battery
• Battery Life: Approximately 2 years
• Timekeeping Accuracy: ±15 seconds per month
• Illumination: Amber LED light with afterglow
• Luminous Features: Neobrite
• Stopwatch: 1-second stopwatch with approximately 30-minute measuring capacity
• Calendar: Full auto calendar to 2099
• Additional Features: Magnetic Shock Release Hand, Multi-Mission Date, Hand Shift and seconds-hand sleep function
• Country of Manufacture: Thailand

Bold Yellow Design

The GAC-2500-9A offers one of the most visually distinctive interpretations of G-SHOCK's contemporary analogue design language. Its vibrant yellow case, bezel and strap create a coordinated appearance that highlights the watch's angular construction and carefully sculpted surfaces. The result is a striking timepiece that combines the rugged character of G-SHOCK with a confident, modern aesthetic.

Drawing inspiration from the original DW-5000C, the 2500 Series retains the familiar octagonal bezel while introducing refined proportions and a streamlined case profile. The carefully balanced combination of softened edges, raised dial elements and geometric detailing creates a distinctive appearance that reflects G-SHOCK's heritage while establishing a new design identity.

The three-dimensional resin dial features raised bar indexes and precisely proportioned hands with a parallel-line design. These elements echo the geometry of the case, creating a cohesive visual arrangement while supporting clear, intuitive time reading. The yellow dial and matching three-cell date window maintain a consistent appearance, allowing the hands and hour markers to remain the primary focus.

Unlike the more understated black, white and dark green models in the 2500 Series, the yellow GAC-2500-9A makes colour a defining feature. Its vibrant finish creates a distinctive contrast against darker clothing and equipment, making it an appealing choice for users who prefer a watch with a stronger visual identity.

Innovative Analogue Timekeeping

The GAC-2500-9A takes a distinctive approach to timekeeping by focusing on the clarity and simplicity of an analogue display. Rather than incorporating a conventional digital LCD, Casio has developed a carefully engineered combination of hands, subdials and multifunction display elements to communicate essential information.

Its distinctive two-eye dial arrangement features a dedicated small seconds subdial positioned at 9 o'clock and the innovative Multi-Mission Date display at 3 o'clock. This balanced layout provides practical functionality while preserving the clean appearance of the main dial.

The central hour and minute hands offer straightforward time reading, while the small seconds subdial provides a separate indication of passing seconds. A subtle Shock Resist motif appears on the tail of the small seconds hand, referencing G-SHOCK's origins and its long-standing commitment to durable watchmaking.

The result is a watch that combines the familiar appeal of traditional analogue timekeeping with the advanced engineering and functionality expected from a modern G-SHOCK.

Magnetic Shock Release Hand Technology

One of the defining innovations of the GAC-2500-9A is Casio's magnetic Shock Release Hand technology. Developed to enhance the durability of the analogue movement, this system uses magnetic force to secure the minute hand rather than relying on a conventional direct attachment to the movement shaft.

The magnetic holding structure allows the minute hand to absorb and dissipate energy generated by impacts and vibration, helping protect the internal movement against shocks encountered during active use. This innovative approach supports G-SHOCK's established reputation for toughness while allowing greater flexibility in the design of the watch hands.

Because the minute hand is magnetically secured, it may temporarily move or vibrate following a significant impact. This is a normal characteristic of the system, and the hand is designed to return to its correct position within a few minutes.

Combined with the watch's shock-resistant case construction, this technology demonstrates how Casio continues to develop new solutions that improve the resilience of traditional analogue timepieces.

Multi-Mission Date Display

The GAC-2500-9A incorporates Casio's innovative Multi-Mission Date system, a multifunction display developed specifically for the 2500 Series. Positioned at 3 o'clock, the distinctive three-cell window provides more functionality than a conventional date display while maintaining the watch's minimalist appearance.

During normal timekeeping, the window provides a convenient date indication. When other functions are selected, the display can communicate operating modes and stopwatch information through its specially engineered mechanism.

The date window is colour-matched to the yellow dial to minimise unnecessary contrast and maintain focus on the primary hour and minute hands. This considered approach allows the watch to provide useful information without introducing the visual complexity associated with more conventional multifunction displays.

The Multi-Mission Date system also supports a full auto calendar programmed through to 2099. Once correctly configured, the calendar automatically accounts for different month lengths and leap years, reducing the need for manual date adjustments.

G-SHOCK Shock Resistance

The GAC-2500-9A retains the dependable shock-resistant construction that has defined G-SHOCK since the introduction of the original DW-5000C in 1983. Its protective resin case and bezel are engineered to help safeguard the internal movement against impacts and vibration during everyday activities.

The lightweight case structure provides an effective balance between durability and comfort, while the flexible bio-based resin strap offers a secure fit during extended periods of wear. Mineral glass protects the dial against the wear associated with regular use.

At just 47 g, the GAC-2500-9A provides the toughness associated with G-SHOCK without the bulk of larger sports watches. Its compact dimensions make it particularly comfortable for users who prefer a streamlined watch that remains practical during work, travel and outdoor activities.

200-Metre Water Resistance

With 200-metre water resistance, the GAC-2500-9A provides dependable protection against water exposure during swimming, wet weather and recreational water-based activities. This substantial level of resistance makes it a versatile choice for users who regularly encounter challenging outdoor conditions.

Combined with G-SHOCK's shock-resistant construction, the water-resistant design offers practicality across a wide range of environments. From everyday commuting and travel to outdoor recreation and physically demanding work, the GAC-2500-9A is designed to deliver reliable timekeeping when exposed to the elements.

Amber LED Illumination & Neobrite

The GAC-2500-9A features an amber LED light designed to improve dial visibility in low-light conditions. The integrated illumination system provides a convenient way to check the time after dark, while the afterglow function extends visibility briefly after activation.

Neobrite luminous coating provides an additional means of reading the time in darkness following exposure to light. Together, these features help maintain the practicality of the analogue display during evening activities, travel and use in poorly illuminated environments.

The warm amber illumination complements the vibrant yellow design, providing practical functionality while maintaining the distinctive appearance of the GAC-2500-9A.

Watch Features & Functions

• Analogue Timekeeping: Central hour and minute hands, with the minute hand advancing every 20 seconds.
• Small Seconds Subdial: Dedicated seconds indication positioned at 9 o'clock, featuring the G-SHOCK Shock Resist motif.
• Multi-Mission Date: Multifunction three-cell display providing date information, operating modes and stopwatch indications.
• Stopwatch: 1-second elapsed-time measurement with an approximately 30-minute measuring capacity.
• Full Auto Calendar: Automatically adjusts the date through to 2099, including different month lengths and leap years.
• Shock Release Hand: Magnetically secured minute hand designed to absorb and dissipate impacts.
• Hand Shift: Temporarily moves the hands to provide an unobstructed view of the in-dial display.
• Seconds-Hand Sleep: Allows the small seconds hand to be stopped when not required, helping reduce power consumption.
• LED Light: Amber illumination with afterglow for improved visibility in darkness.
• Neobrite: Luminous coating to assist analogue time reading in low-light conditions.
• Quartz Accuracy: Approximately ±15 seconds per month under normal operating conditions.

Battery-Saving Seconds-Hand Sleep Function

The GAC-2500-9A incorporates a practical seconds-hand sleep function designed to help conserve battery power. When continuous seconds indication is not required, the wearer can stop the dedicated small seconds hand, reducing the energy consumed by the movement.

Under normal operating conditions, the CR1025 battery provides approximately two years of operation. The seconds-hand sleep function offers an additional way to manage power consumption, making the watch particularly convenient for users who prefer dependable, low-maintenance equipment.

Unlike smartwatches and rechargeable devices, the GAC-2500-9A does not require regular charging, smartphone connectivity or software updates. Its conventional quartz movement delivers reliable timekeeping with straightforward operation and minimal user intervention.

Lightweight Bio-Based Resin Construction

The GAC-2500-9A incorporates bio-based resin materials in its case, bezel and strap. Derived partly from renewable organic resources, these materials provide an alternative to conventional petroleum-derived plastics while maintaining the flexibility and durability required for everyday watch construction.

Measuring 46.7 × 44.5 × 12.7 mm and weighing just 47 g, the watch offers a comfortable balance between robust construction and compact proportions. Its flexible resin strap accommodates wrist sizes from 145 to 215 mm, providing a secure fit for a wide range of users.

The lightweight design makes the GAC-2500-9A particularly suitable for prolonged wear, while its distinctive yellow finish provides a bold alternative to more traditional dark-coloured G-SHOCK watches.

Why Choose the Casio G-SHOCK GAC-2500-9A?

The GAC-2500-9A combines the enduring appeal of G-SHOCK's original octagonal design with a bold, contemporary approach to analogue timekeeping. Its vibrant yellow colour scheme, carefully proportioned case and innovative two-eye dial create a distinctive appearance that highlights the engineering and design details of the 2500 Series.

Beyond its styling, the watch introduces advanced features including a magnetic Shock Release Hand, multifunction Multi-Mission Date display and battery-saving seconds-hand sleep function. With shock-resistant construction, 200-metre water resistance, amber LED illumination and lightweight bio-based resin materials, the GAC-2500-9A delivers an excellent balance of durability, comfort and practical functionality.

For anyone seeking a distinctive G-SHOCK with bold styling, intuitive analogue readability and the dependable performance associated with the brand, the GAC-2500-9A offers a compelling combination of innovative engineering and everyday versatility.

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TacTree is an authorised Casio UK retailer. All Casio watches supplied are 100% genuine, brand new and sourced through approved UK distribution channels. Orders are supplied with official Casio packaging and manufacturer documentation for complete authenticity and peace of mind.