Casio G-Shock Master of G FROGMAN 30th Anniversary GW-8230NT-4 (JDM)

📌 Description

Celebrate three decades of the legend of the deep with this limited edition marking the 30th anniversary of the iconic FROGMAN line. This exclusive commemorative model pays direct homage to the legendary DW-8200NT released in 2000, reviving its bold and avant-garde asymmetrical design in a striking all-red color scheme (strap, bezel, and LCD screen).

More than just a simple reissue, this piece has evolved with Casio’s latest technology. It incorporates the Tough Solar charging system with a panel specially designed to match the geometry of the original dial, and promotes sustainability by using environmentally friendly bio-based resins in both the strap and the bezel, combined with a titanium core featuring a black ion-plating (Black IP) finish. The legendary FROGMAN diving frog character is engraved on the screw-down case back and is spectacularly revealed when the LED backlight is activated. A must-have collector’s item with genuine ISO certification for professional diving.

🔥 Key Features (Highlights)

• 30th Anniversary Limited Edition: The third commemorative model that revives the iconic red color of the DW-8200NT from the year 2000.
• ISO-Certified Diver’s 200M: Genuine water resistance for professional scuba diving (not just recreational).
• Titanium and Bio-Resin Construction: An ultra-lightweight titanium case resistant to marine corrosion, finished with eco-friendly resin.
• Smart Tough Solar: Solar-powered, eliminating the need for battery replacement, with up to 36 months of power reserve in total darkness.
• Collection Details: Screw-back case back with a special engraving and a frog silhouette hidden in the display lighting.

🛠️ Technical Specifications

Basic and Exterior Information

Feature Detail

Dimensions 52 × 50.3 × 18 mm

Weight 84 g (Extremely lightweight thanks to titanium)

Case and Bezel Material Titanium (with black ion plating / Black IP) / Bio-based resin

Strap Eco-friendly bio-based resin (Adjustment: 150 to 220 mm)

Crystal High-strength mineral crystal

Case Back Screw-down case back (Screw-back) for maximum water resistance

🤿 Diving-Specific and Nature Functions

• Dive Mode: Measures dive time (in 1-second increments up to 24 hours) and automatically calculates surface interval (up to 48 hours).
• Data Memory: Storage of up to 10 dive logs (date, start time, and total dive time).
• Tide Chart: Visual indication of tide levels for any selected date and time.
• Lunar Data: Moon phase chart and lunar age for specific dates.

Power and Battery Management

• Charging System: Tough Solar (stable solar power).
• Power Saving: Power Saving mode (the screen turns off automatically if the watch is left in the dark).
• Battery Life:
  • ~14 months with normal use after a full charge (without exposure to light).
  • ~36 months when stored in total darkness with the power-saving function enabled.
• Charge Indicator: Battery level visible on the display.

Module Functions

• Illumination: Fully automatic high-intensity LED (Super Illuminator) (turns on when you rotate your wrist in the dark). Adjustable duration (1.5 or 3 seconds) with afterglow.
• World Time: 31 time zones (48 cities + UTC), city code display, and daylight saving time on/off.
• Stopwatch: 1/100-second accuracy with a capacity of up to 24 hours (Modes: elapsed time, split time, and 1st–2nd place).
• Timer: 24-hour countdown (configurable in 1-minute and 1-hour increments).
• Alarms: 5 daily alarms (1 with wake-up/snooze function) and hourly chime.
• Other features: Full automatic calendar through 2099, 12/24-hour format, and option to mute button tones.
• Accuracy: ±15 seconds per month (without signal reception).