Casio G-Shock analog resin watch dark green 45 mm GAC-2500-3AER

Casio G-Shock GAC-2500-3AER brings the octagonal heritage of the 1983 DW-5000C into the contemporary fully analog 2500 series. Its purposeful case, clear analog layout and practical timing functions create a distinctive CasioNaut character for everyday wear.

The GAC-2500-3AER combines a dark green resin dial and bezel with a matching dark green bio-based resin strap. The earthy color gives the fully analog 2500-series CasioNaut a grounded, contemporary character suited to casual and outdoor-minded styling. CasioNaut is an unofficial enthusiast nickname, not an official Casio name; the design takes inspiration from the DW-5000C and has no Patek Philippe affiliation. This is a resin GAC model, not G-Steel and not a steel bracelet.

The two-eye layout keeps the hour and minute hands easy to read while the small seconds register sits at 9 o'clock. At 3 o'clock, the three-cell Multi-Mission Date window shows the date, stopwatch elapsed minutes and useful setting or function information.

Once the year, month and date have been set, the full auto-calendar remains correct through 2099. This dependable analog convenience means you can read the date at a glance without giving up the traditional character of an analog watch.

The special analog movement was developed for this series and manufactured at Yamagata Casio. Its magnetic Shock Release Hand attaches the minute hand securely while absorbing and distributing the force of impacts, helping preserve reliable hand positioning.

A new CR1025 battery provides approximately 2 years of operation with Second Hand Sleep disabled, or approximately 5 years when Second Hand Sleep is enabled. In sleep mode, the small seconds hand stops to conserve energy; the five-year figure is conditional, not unconditional.

This is a genuine G-Shock built for shock resistance and 200 m / 20 bar water resistance. Mineral glass, Neobrite and an amber LED with afterglow add practical legibility, day or night, without compromising the watch's robust character.

Key benefits:

• Dark green resin dial adds a calm, distinctive tone to the analog layout.
• Matching dark green resin bezel gives the case a cohesive finish.
• Dark green bio-based resin strap keeps the 47 g watch easy to wear.
• Inspired by the original 1983 DW-5000C and its octagonal design language.
• A contemporary fully analog watch in the 2500 series.
• Three-cell Multi-Mission Date display at 3 o'clock.
• Full auto-calendar operating through 2099 after setup.
• Magnetic Shock Release Hand helps absorb and distribute impacts.
• Dedicated small seconds display at 9 o'clock.
• Second Hand Sleep supports approximately 2 years of active operation or approximately 5 years with sleep enabled.
• One-second stopwatch with a 30-minute capacity.
• Shock-resistant G-Shock construction.
• 200 m / 20 bar water resistance.
• Amber LED light with afterglow.
• Neobrite luminous treatment for practical visibility.
• Hand-shift feature improves dial visibility when needed.

Technical specifications:

• Case length x width: 46.7 × 44.5 mm
• Thickness: 12.7 mm
• Weight: 47 g
• Case material: Resin and bio-based resin
• Bezel: Dark green resin
• Strap/bracelet: Dark green bio-based resin strap
• Clasp: Pin buckle
• Glass: Mineral glass
• Movement: Fully analog quartz
• Accuracy: +/-15 seconds/month
• Calendar: Full auto-calendar through 2099
• Date display: Multi-Mission Date
• Stopwatch: 1-second resolution, 30-minute capacity
• Light: Amber LED with afterglow
• Luminous material: Neobrite
• Battery: CR1025
• Battery life: Approximately 2 years with seconds active / approximately 5 years with Second Hand Sleep enabled
• Water resistance: 200 m / 20 bar
• Wrist fit: 145–215 mm

The GAC-2500-3AER translates the DW-5000C heritage into a dark green, fully analog CasioNaut with a confident modern profile. Its resin case and strap, 200 m water resistance and Multi-Mission Date functions support practical everyday adventure.