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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Can a NATO Watch Strap be used on the Casio G-Shock Mudmaster GWG-1000-1A3 Watch? If so, what size?
Mudman & Mudmaster…which are more suitable for Female?
I would think the Mudman since it is smaller, but big watches can look good on females too.
Do they make a GWG 1000 1A3 that has a positive display instead of a negative one. It has all the features Im looking for except that one
Unfortunately there is currently no GWG-1000 model with a positive LCD display. Perhaps that will change in the future.
Hi, is there any difference between GWG-1000-1A3DR and GWG-1000-1A3ER other than price? I’m working in India where the former is available for equivalent of £450, whereas it’s listed for £660 on the UK site. I’ve bought G-Shock in India in the past which did have a difference (didn’t have the multi band 6 feature), but I can’t see any immediate differences between these models other than ~£210!
It’s the same. The DR suffix means it’s meant for export outside Japan. The ER suffix means it’s meant for the European market. It is the same model.
Great, thank you!
G-Central…..you rock!! All queries dealt with with complete precision. Kind of like the watches in question. And that’s all I got to say about that.
What does mean an additional letters ‘ER’ in the type of watch, ex. GWG-1000-1AER?
It means that watch is designated to be sold in the European market. Otherwise it is the same as any other GWG-1000-1A model.
Do you know where I could still get the official rescue red mudmaster?
No sorry, it seems to be sold out everywhere.
Is there? Or will there be available metal band for GWG-1000?
Thanks
No, and probably not.
Hi. Can u tell me please what there are different prices at the same model gwg 1000? I leave in Romania and there are 4 different prices between colors. Are there any other difference beside colours? Thank you
They are the same other than the colors. Some colors have limited production runs, or use ion plating on the metal parts for different color accents, so that will make it more expensive.
I need help.
I bought this Casio G-Shock MudMaster GWG 1000.
The LCD has a black background.
Is there any feature which can invert the colours of the display ?
I am used to the ProTrek which had a clear background with white digits.
No you cannot invert the LCD display.
Thankyou.