| Size | ★★★★★ |
| Weight | ★★★★★ |
| Functions | ★★★ |
| Materials | ★★★ |
| Price | ★★★★ |
GWG-100 Model Range *may be updated
*Want to be the first to know about new G-Shock Updates? Here we store all recent Monthly G-Shock Updates →
Quick Content Guide
- GWG-100 Model Range *in different colors and bands
- General information about the watch *year of first release, model range etc.
- G-Shock GWG-100 Display Guide *for key functions only
- G-Shock GWG-100 on the wrist! *only images and only on the wrist
- GWG-100 Usage Patterns *what the watch is usually meant for
- Feedback from Users and Experts *anonymous from different sources
- The most distinctive specs *from our Editorial point of view
- Other G-Shock GWG Watches *similar by price and functions but different by cases
- Official GWG-100 Specs *all details and for base version GWG-100-1A3
- Japanese Unique Features in GWG-100 *the most distinctive features in details
- GWG-100 Comparison Table *with similar G-Shock Watches
- Full Photo Gallery *various images
- Recent News about GWG-100 *the latest breaking news and videos
About the Watch in Short. Representative of the dirt-resistant direction of the G-Shock Mudmaster. The design of the case and buttons does not allow dust, dirt, sand and other small particles to get inside the watch, thereby making the GWG-100 even more airtight than ordinary jishoks. The cylindrical shape of the buttons and the metal of which they are made protect the buttons from shock, and the toothed texture makes pressing more convenient when using the watch with gloves. The image and appearance of the GWG-100 is borrowed from vehicles and special-purpose tools that are used by rescue teams in the disaster area. 4 separate digital windows contribute to a more detailed display of data on the dial. Special inserts on the back of the strap provide a more snug fit to the hand. Time is automatically synchronized by radio waves, and the solar battery is charged from daylight. Bright neon lights fully illuminate the dial in the dark.
G-SHOCK MUDMAN/MUDMASTER Evolution Timeline
October, 2021
GWG-2000
800$ on Amazon →
★★★★
This compact design is made possible by the forged carbon bezel, carbon core guard case structure, and mud-resist buttons
More →
July, 2019
GG-B100
320$ on Amazon →
★★★★
Fisrt MUDMASTER Watch with Quad Sensor & a new Mission Log Function
More →
September, 2017
GG-1035
G-SHOCK 35th Anniversary Mudmaster Watch
December 30, 2017
GWG-100
400$ on Amazon →
★★★★
Compact Size MUDMASTER with Tough Solar and Multi-Band 6 but Without Triple Sensor
More →
General Information
| Price | $560 *average Amazon Price, we may earn commission from purchases |
| Year of first Release | 2018 |
| Suitable for Wrist Size | 160 – 220 mm |
| Module Number | 5562 / Manual |
| Model Range | MUDMASTER (The Mudmaster has been designed to withstand the toughest of conditions. With a digital compass, barometer, altimeter, thermometer and step tracker, you’ll reach your goal even when challenges seem insurmountable. MUDMASTER – the perfect union of toughness and technical finesse.) |
| Battery Type | Solar (G-Shock Batteries) Buy Battery on Amazon → |
| Other Divisions the GWG-100 belongs to: *you may find all watches of the division by clicking on the link | G-Shock Ana-Digi G-Shock Compass G-Shock Barometer and Altimeter G-Shock Solar |
G-Shock GWG-100 Display Guide *for key functions only. For you to know how it works))
Using the World Time Mode
You can use the World Time Mode to view the current time in one of 31 time zones (48 cities) around the globe. The city that is currently selected in the World Time Mode is called the “World Time City”.
Using the Stopwatch
The stopwatch measures elapsed time, splitmtimes, and two finishes.
To enter the Stopwatch Mode
Use C to select the Stopwatch Mode (STW)
Using the Countdown Timer
The countdown timer can be set within a range of one minute to 100 minutes. An alarm sounds when the countdown reaches zero.
Using the Alarm
You can set five independent alarms. When an alarm is turned on, an alarm tone will sound for about 10 seconds each day when the time in the Timekeeping Mode reaches the preset alarm time. This is true even if the watch is not in the Timekeeping Mode.
G-Shock GWG-100 on the wrist!
GWG-100 Usage Patterns *what the watch is usually meant for
Feedback from Users *accumulated information from our own comments and emails, forum threads, socials, reviews, etc.
PROs
+ durability
+ comfortable
+ solar atomic version of the GG-1000
+ it’s amazing. All it needed was a quad sensor.
+ the illumination system on gwg100 is incomparable. The gwg100 has that beautiful multicolor light + screen.
CONs
– expensive
– the 12 and 6 look almost too big
– no sapphire crystal
– miss the ABC functions
– no second hand
– large
– digital display is very poor. Not able to see what is there in screen. Every time u have to press light button to see
Feedback from Experts *based on comparison info with similar watches by price, model range, etc.
PROs
+ hourly Time Signal
+ very accurate. Radio-controlled (via atomic watch signals)
+ solar powered
CONs
– expensive but worth the money
– 31 time zones
– no Altimeter
– no Barometer
– no Compass
– no Step Tracker
– no Sunrise Sunset
– no Thermometer
What we like in GWG-100 *comments by experts with 10 years experience in writing about Casio watches
— 200-meter water resistance (good for swimming but not for deep diving)
— Mud Resistant (helps to ensure that nothing gets into the watch when down and dirty work takes you deep into the dirt and sludge)
— Tough Solar (CASIO’s original solar-charging system converts not only sunlight but also light from fluorescent lamps and other sources into power)
— Radio-controlled Watch; Multi band 6 (additional way for time sync. This watch receives time calibration radio signals that keep the displayed time accurate)
Other G-Shock GWG Watches *similar by price and functions but different by cases
Official Casio Description. MASTER OF G Series MUDMASTER, the watch that is designed and engineered for wear and use by those whose work takes them into areas scattered with rubble, dirt, and debris, is proud to announce new models that pack solar powered operation into dirt and mud resistant configurations. The button guard cylinder structure of these models seals out mud and dust, enabling use in severe environments. Cylindrical piping protects buttons against impact and improves their operation, and gaskets inside the buttons prevent the entry of fine sand and dust particles. The rugged designs of these watches are in the image of the special purpose vehicles and tools that are used by disaster relief teams.
Wide hour and minute hands and large Arabic numeral hour markers provide easier reading under harsh conditions, and the band has a distinctive non-slip texture, rounding out a tough no-nonsense design. These new MUDMASTER models are the perfect choice for anyone who requires tough performance under tough conditions.
Official GWG-100 Specs / Features *for base version GWG-100-1A3
- Case / bezel material: Resin / Stainless steel
- Resin Band
- Mineral Glass
- Neobrite
- Shock Resistant
- Mud Resistant
- 200-meter water resistance
- Double LED light
LED light for the face (Full auto LED light, Neon illuminator, selectable illumination duration (1.5 seconds or 3 seconds), afterglow)
LED backlight for the digital display (Full auto LED light, Super illuminator, selectable illumination duration (1.5 seconds or 3 seconds), afterglow) - Solar powered
- World time
31 time zones (48 cities + coordinated universal time), daylight saving on/off, Home city/World time city swapping - 1/100-second stopwatch
Measuring capacity: 59’59.99”
Measuring modes: Elapsed time, split time, 1st-2nd place times - Countdown timer
Measuring unit: 1 second
Countdown range: 100 minutes
Countdown start time setting range: 1 second to 100 minutes (1-second increments and 1-minute increments) - 5 daily alarms
- Hourly time signal
- Hand shift feature (Hands move out of the way to provide an unobstructed view of digital display contents.)
- Battery level indicator
- Power Saving (display goes blank to save power when the watch is left in the dark)
- Full auto-calendar (to year 2099)
- 12/24-hour format
- Button operation tone on/off
- Regular timekeeping
Analog: 2 hands (hour, minute (hand moves every 20 seconds))
Digital: Hour, minute, second, pm, month, date, day - Accuracy: ±15 seconds per month
- Approx. battery operating time:
8 months on rechargeable battery (operation period with normal use without exposure to light after charge)
19 months on rechargeable battery (operation period when stored in total darkness with the power save function on after full charge) - Size of case : 56.2×54.9×17.3mm
- Total weight : 88g
Enjoy Japanese Unique Features in GWG-100!
*some images are about G-Shock 5000/5600 cases, but the technology, approaches, concepts and philosophy remains the same for the whole G-Shock Model Range
Solar Power. None-Stop – A solar panel converts even weak illumination from fluorescent lighting into electric power. A rechargeable battery with a large power storage capacity supports stable operation of various functions with high electricity consumption. You never have to worry about the battery running down because it’s a solar battery. Casio watches with solar technology, receive thermal and electrical energy that recharges the watch batteries through solar panels on the face of the watch.
MultiBand 6. Terrestrial radio wave reception from 6 transmission stations worldwide. Automatic time correction available in Japan, North America, UK, Europe and China.
— Reception is possible even when surrounded by buildings.
— Signals are received during the night to keep the displayed time exact. — Reception is possible with less than normal power consumption.
GWG-100 Comparison Table with similar G-Shock Watches
GWG-100 | |||
Price (Amazon) | |||
Year of first Release | 2019 | 2017 | 2016 |
Accuracy | Bluetooth (via phone app) | Radio-controlled (via atomic watch signals) | ±15 seconds per month |
SmartWatch Features | G-Shock Connected App (simplifies certain watch operations by letting you perform them on your phone screen) | No | No |
Light | Neobrite (hands and hour markers) Double LED light | Neobrite (hands and hour markers) Double LED light | Neobrite (hands and hour markers) and LED light (Super Illuminator) |
Alarm | 5 daily alarms | 5 daily alarms | 5 daily alarms (with 1 snooze alarm) |
Timer | Measuring unit: 1 second | Measuring unit: 1 second | Measuring unit: 1 second |
Stopwatch | 1/100-second stopwatch | 1/100-second stopwatch | 1/100-second stopwatch |
Hourly Time Signal | Yes | Yes | Yes |
World Time | 38 time zones (38 cities + coordinated universal time), daylight saving on/off, Home city/World time city swapping | 31 time zones (48 cities + coordinated universal time), daylight saving on/off, Home city/World time city swapping | 31 time zones (48 cities + coordinated universal time), daylight saving on/off |
Altimeter | Yes | No | No |
Barometer | Yes | No | No |
Compass | Yes | No | Yes |
Second Hand | Yes | No | Yes |
Step Tracker | Yes | No | No |
Sunrise Sunset | Yes | No | No |
Thermometer | Yes | No | Yes |
Case / bezel material | Carbon (Carbon Core Guard) | Resin / Stainless steel | Resin / Stainless steel |
Glass | Mineral (Spherical Glass) | Mineral glass | Mineral glass |
Battery | 2 years on CR2025 | Solar powered CTL920 | 2 years on SR927W |
Size (mm) *we consider 48.9×42.8×13.4 to be a traditional watch size (as in DW-5600). So you are to compare how far or close the watch is to this size | 55.4×53.1×19.3 | 56.2×54.9×17.3 | 56.2×55.3×17.3 |
Full features (if you want to know more) |
GWG-100 Replacement Band (Strap) *availability
We think it is very important (before buying a new watch) to know if there will be some choice as for replacement bands for GWG-100 (in future or even now). So we made a research and you shouldn’t worry about your future as the bands are available for buying.
starting from 61$ on eBay →
Recent News about GWG-100
- G-Shock GWG-100 PROs & CONs from users and experts
- [G-Shock Old Alternative] DW-9300 started in 1998 and how’s it going now?
- [G-Shock Comparison] GG-B100 VS GWG-100 VS GG-1000
- [Live Photos] G-Shock GR-B100GB-1A and GWG-100GB-1A — Athlete photo series vol.2
- [Video] G-Shock GWG-100 and Portugal’s Public Security Police
You ask, we answer…
The watch is good for swimming but not for deep diving.
It helps to ensure that nothing gets into the watch when down and dirty work takes you deep into the dirt and sludge.
CASIO’s original solar-charging system converts not only sunlight but also light from fluorescent lamps and other sources into power.
This is additional way for time sync. This watch receives time calibration radio signals that keep the displayed time accurate.
Not sure about GWG-100? There are more G-Shocks!
