Introduced in February 2022, GMW-B5000MB is a black full metal variant of the Casio G-SHOCK GMW-B5000 watch model.

Based on the GMW-B5000, the original full-metal take on the first-ever G-SHOCK, the new GMW-B5000MB features an array of detailed finishes that come together in a refined black design.


The GMW-B5000MB brings together individual components treated with honing finishes and multiple polishings in a premium-quality, shock-resistant watch with a uniquely appealing look that makes the most of rich texture and feel.

The entire exterior of the timepiece is honed and treated with black ion plating to deliver matte black sophistication, and additional finishes are applied to individual details.


The hairline finish on the raised areas on the side of the bezel and the sides of the band retains a metallic texture, while tempering the shine. The mirror finish, by contrast, adds glossy shine to the surface of the screws, buttons, and other details.


With this latest model, Casio adds a new finishing process, as well. After the initial black ion plating, the top surface of the bezel is polished again with a hairline finish to expose most of the stainless steel beneath, with its silver-colored gleam.


The chic and seamless integration of the silvery hue of the stainless steel of the bezel and matte black of the body, complemented by multiple intricate finishes, results in a beautifully detailed, quality design with a one-of-a-kind, sophisticated look.


The functionality of the GMW-B5000MB is just as good as its design. The watch comes with both standard radio wave reception and Smartphone Link connectivity, which allows the owner to use the G-SHOCK Connected app to maintain precision timekeeping and easily manage alarms, world time, and other settings.


The watch can also use handy Reminder and Phone finder functions when paired with the app.

Technical details

Model: Casio G-SHOCK GMW-B5000MB-1ER

Construction: Shock-resistant
Top surface of bezel treated with new finishing process
Case dimensions: 49.3 × 43.2 × 13.0 mm
Water Resistance: 20 bar

Radio Frequency
77.5 kHz (DCF77: Germany); 60 kHz (MSF: UK); 60 kHz (WWVB: USA); 40 kHz (JJY: Fukushima, Japan) / 60 kHz (JJY: Kyushu, Japan); 68.5 kHz (BPC: China)

Radio Wave Reception
Automatic reception up to six times a day (except for use in China: up to five times a day)

Communication Specifications
Communication Standard: Bluetooth® low energy
Signal Range: Up to 2 meters (may differ depending on surrounding conditions)

World Time
5 world times selected from 39 cities (39 time zones,* daylight saving on/off) and Coordinated Universal Time, city name display, home time/world time city swapping, auto summer time (DST) switching

1/100 second (00’00”00 to 59’59”99) / 1 second (1:00’00” to 23:59’59”); measuring capacity: 23:59’59.99″; measuring modes: elapsed time, split time, 1st and 2nd place times

Countdown Timer
Measuring unit: 1 second (maximum 24 hours)

5 daily alarms (with 1 snooze alarm); hourly time signal

Other Functions
Smartphone Link functions (World Time: over 300 cities + user-added cities, Auto time adjustment, Easy watch setting, Time & place, Reminder, Phone finder); date/month display swapping; day display (in English, Spanish, French, German, Italian or Russian); full auto-calendar; 12/24-hour format; button operation tone on/off; full auto LED backlight (Super Illuminator and afterglow: 2/4 seconds, fade-in/fade-out afterglow); low battery alert

Power Source
Tough Solar power system (solar-charging system)

Continuous Operation
About 22 months with the power-saving function ON after full charge

Total Weight
Approx. 167g