Quick Jump: View all G-Shock Mudmaster GWG-1000 Models
The highly anticipated GWG-1000 Mudmaster is now available for sale. This new model combines features of the Mudman and Rangeman with an analog/digital hybrid display. It has a case design that looks like a cross between an aviation G-Shock and the Rangeman, giving it a tough and tactical appearance. Model numbers are GWG-1000-1A (black), GWG-1000-1A3 (black with olive band), and GWG-1000-1A9 (black with yellow band). List price is $750.
The GWG-1000 is designed to withstand harsh environments like the desert or mud. It has a protected button structure like the Rangeman. In addition to mud resistance the watch is also resistant to heavy vibration. Like the Rangeman, the Mudmaster features the Triple Sensor with compass bearing, altimeter/barometer, and thermometer. It also has Tough Solar charging and Multi-Band 6 radio time synchronization along with the standard shock and water resistance (200 meters). Other specs include low temperature resistance to -10°C or 14°F, world time (29 cities, DST on/off), stopwatch (24 hours, modes: elapsed time, split time, 1st and 2nd place times), countdown timer (max 60 minutes), 5 daily alarms, hourly time signal, auto-calender, and dual LED backlights for the analog and digital displays. The watch measures 59.5 × 56.1 × 18.0 mm and weighs approximately 119 grams. Pictured is the GWG-1000-1A3.
The new Mudmaster is a tactical-style watch that combines advanced technical features with extreme durability and takes the analog-style G-Shock to another level. Casio has been focusing on analog designs for its high-end G-Shock watches lately, and it will be interesting to see how this trend continues in future models. The GWG-1000 will be getting a lot of attention as one of the premium G-Shock models.
Angle view:
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Resin band with features listed:
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GWG-1000 MUDMASTER PROMOTIONAL VIDEO:
UPDATE: The retail price for the GWG-1000 is $750. Recently discovered leaked model numbers also show a listing for a GWG-1000GB-1A “Master of G Black and Gold” seasonal December 2015 release for $800.
UPDATE (August 24): Casio America announced the release of the Mudmaster GWG1000-1A3 and GWG1000-1A9 and stated the Mudmaster is part of the Master of G line.
Usability Update: The Mudmaster GWG-1000 has proven to be very popular, especially with customers in the United States and Europe who are looking for a very large and rugged outdoor watch.
GWG-1000 Pros: Triple Sensor for outdoor activities. The electronic crown allows for quick and easy setting adjustments. Very rugged style with mud and dust resistance. Ideal for large wrists.
GWG-1000 Cons: May be too large for smaller wrists. No sunrise and sunset time like the Rangeman GW-9400. Only available with inverted LCD display, which can be more difficult to read.
Alternatives: The battery-powered Mudmaster GG-B100 is smaller with a Triple Sensor plus a step counter and Bluetooth smartphone connectivity. The Rangeman GW-9400 offers similar functions with an all-digital display. The GBD-H1000 also has a Triple Sensor and solar charging plus a step tracker, heart rate monitor, and GPS timekeeping. There are also many Pro Trek watches with Tough Solar and the Triple Sensor.
Below are the GWG1000-1A (left), GWG1000-1A3 (middle), and GWG1000-1A9 (right).
G-Shock Mudmaster GWG-1000-1A
Black bezel with light yellow lettering, black backlight front button, light yellow markers and hands, black resin band. The GWG-1000-1A was not released in North America and is available as an import.
G-Shock Mudmaster GWG-1000-1A3
Black bezel with white and gray lettering, silver backlight front button, white markers and hands, olive green resin band.
G-Shock Mudmaster GWG-1000-1A9
Black bezel with gray and stealth lettering, black backlight front button, yellow markers and hands, yellow resin band.
G-Shock Mudmaster GWG-1000GB-1A
Black and Gold Master of G Series
The GWG-1000GB-1A adds a luxurious touch to the Mudmaster’s appearance by using a gold color for the ring dial, buttons, buckle, and band keeper. This model will also be released in the USA as the GWG1000GB-1A. This special edition winter 2015 release is part of the Black and Gold Master of G Series.
G-Shock Mudmaster GWG-1000RD-4A
Rescue Red Master of G Series
The GWG-1000RD-4A was announced by G-Shock Japan for March 2016 and is part of the Rescue Red Master of G Series. The GWG-1000RD-4A features red bands and a blue dial ring.
G-Shock Mudmaster GWG-1000DC-1A5
Master in Desert Camouflage Series
The Mudmaster GWG-1000DC-1A5 is a September 2016 release as part of the Master in Desert Camouflage Series. The watch has a black bezel with light brown G-Shock lettering and bands with a desert camouflage pattern.
Maharishi x G-Shock Mudmaster GWG-1000MH-1A
The Maharishi x G-Shock Mudmaster GWG-1000MH-1A is the first GWG-1000-based collaboration watch. This late-2016 limited edition model is made in partnership with London clothing store Maharishi. The bands feature a unique “British Bonsai Forest” pattern that resembles digital camouflage. The face, hands, and markers have a unique orange design.
G-Shock Mudmaster GWG-1000-1A1
A Basic Black Mudmaster
The GWG-1000-1A1 is perhaps the best Mudmaster choice for those who like to keep it simple. With a straightforward black and gray color scheme, the GWG-1000-1A1 gives off an extremely tough appearance.
G-Shock Mudmaster GWG-1000WLP-1A
The GWG-1000WLP-1A is a Love The Sea And The Earth 2019 edition in collaboration with non-profit organization Wildlife Promising. It has a black case with gold accents and a yellow band with a leopard print, inspired by the wild leopard of East Africa.





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I was looking at the GWG1000-1AJF 2015 model but now I see that the GWG1000-1A3 was just released 4/2018 and is this a better watch?
It actually came out at the same time. They are the same watch, just different colors.
Ahh thank you very much
What does 1a3cr means? I had the 1a3 before.
It’s the same, the “CR” just means it is meant for export outside Japan.
Is there any other difference then the color between gwg 1000 1a3 and gwg 1000 gb,thanks.
Yeah the functions are the same and just the colors are different. Also, I think the the GWG-1000GB might not have luminous index markers like the GWG-1000-1A3, just the hands and 12-3-6-9 numbers are luminous.
Only thing that lets this tough G-Shock down is the light, my last Mudman illuminated the watch so well, you could read the digital screen. The GWG1000-1A3 has no lighting for the screen. I used to push the illuminated light button walk around the house using it as a torch it was that bright.
What is the best selling color. i have ordered a GWG1000-1A3 for about $450 and the other color are cheaper. The All Black model is the cheapest. I have read in one of the answers that few models are ion plated. Is the 1A3 model ion platted. PLease help.
I don’t have any official figures, but I would guess it’s the GWG-1000-1A3 or GWG-1000-1A1. Some parts like the screws, buttons, and band keeper may be ion plated on some models. The metallic (ring) part of the bezel is ion plated. The front screws on the GWG-1000-1A3 appear to be ion plated.
Looks like there’s a new model out. Looks awful but hey at least it’s new!
https://g-shock.co.uk/gwg-1000wlp-1aer
GWG-1000WLP-1AER
G-SHOCK LEOPARD WILDLIFE
£699.00
Yeah, we wrote about that one in another article but didn’t list it here.
https://www.g-central.com/g-shock-baby-g-wildlife-promising-leopard-editions-for-love-the-sea-and-the-earth-2019-winter/
Ahh I did a search but it didn’t show up. Oops! They’re all over eBay and judging by the prices not too popular.
Love my green GWG-1000 and would be lovely to see a new colour preferably with a positive led. All the best, Mark.
Hello. Why is the JF model more expensive in the markets then the 1A3 version? Is there something that makes the JF version more valuable? Also can you please tell me if the year they were made and the year they are sold make any difference? ie made in 2018 sold new in 2020. Thanks for the great information.
The JF means it is from Japan. If the rest of the model name is the same, it’s the same watch, but it is just meant to be sold in Japan. If you buy it outside of Japan, it probably won’t include a warranty. I don’t think the year it is sold makes much a difference. For battery-powered models, it may mean a shorter battery life, but this seems to be something that is factored into the estimated battery life specs.
i really appreciate the reply. im just wondering why JF versions command more of a pricepoint then its counterparts even though those are also made in japan (correct?). whats the perception around the higher price? anyways thanks again great point on the estimated battery life.
It depends on the particular model. Not all G-Shocks are made in Japan. The new models usually get released in Japan first, so they may be charging a premium because you can’t get it anywhere else. If it’s a limited edition model, they tend to cost more if it’s from Japan. Maybe they charge more because it’s more of a hassle to send something internationally. I don’t really have the answer to this question. There are some cases where they do not charge much of a premium.