Description
The Casio G-Shock G-7900-1D (also referenced as G-7900-1 / G-7900-1DR / G-7900-1ER) is an ultra-rugged, heavy-duty digital timepiece engineered for extreme outdoor, marine, and winter environments. Part of G-Shock’s specialized rescue and marine utility series, this reference is instantly recognizable by its muscular matte black resin case, four prominent bezel screws, and oversized protective pushers designed for easy operation even while wearing heavy gloves. Delivering an unbeatable combination of environmental resilience and specialized data tracking, it offers 200-meter water resistance and extreme low-temperature protection down to -20°C (-4°F).The defining visual highlight of the G-7900-1D is its high-functionality multi-window digital LCD display. Set beneath a scratch-resistant mineral glass crystal, the layered digital screen features dedicated top indicators for graphic Tide Graph and Moon Phase tracking, providing essential ocean and lunar data for surfers, sailors, fishermen, and marine professionals. The watch is completed with a flexible black resin strap equipped with ergonomic wrist-flaps on the case back, ensuring a snug, comfortable fit and maximum stability during intense physical activity. Beneath its heavy-duty exterior, the watch is powered by Casio’s precision in-house digital quartz movement (Module 3194). Engineered for serious timing performance, it features Dual 1,000-Hour Stopwatches (Stopwatch 1 with 5-second Auto-Start capability), allowing users to track two separate long-duration events simultaneously. The digital module comes loaded with high-level features, including World Time across 29 time zones (48 cities + UTC), a 24-hour countdown timer with auto-repeat and progress beeper, 5 multi-function daily alarms (including 1 snooze alarm), an hourly time signal, flash alert, button operation tone on/off, and a full auto-calendar programmed to the year 2099. Dark conditions are instantly illuminated by a high-intensity Auto Electro-Luminescent (EL) backlight with Afterglow that activates automatically with a tilt of the wrist .Built to withstand severe impact, extreme cold, and aquatic depth, the watch achieves a certified 200-meter (20 bar / 660 ft) water resistance rating suitable for heavy rain, surface water sports, and scuba diving. Measuring 52.4 mm in length by 50.0 mm in width with a profile thickness of 17.7 mm, it weighs 68.2 grams for a commanding, tactical presence on the wrist.
