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The Casio G-SHOCK Mudmaster GWG-2000-1A3ER is built for the outdoor activities that other models find too demanding. When other watches reach their limits, this G-SHOCK power timepiece makes starts to make fun. I had a sister model, the Casio G-SHOCK Mudmaster GWG-2000-1A5ER briefly in hand some weeks ago.


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G-SHOCK Mudmaster GWG-2000-1A3ER + G EXPERIENCE 2022 – 4K
Casio G-SHOCK Mudmaster GWG-2000-1A3ER Review
Photo © 2022 by WATCHDAVID® David Drilling – All rights reserved


Casio invited to the G-EXPERIENCE DAYS 2022 at the end of July. In the border region between Austria and Germany, other bloggers, editors, photographers and I had the opportunity to push our limits.

Cool G-SHOCK EXPERIENCE DAYS Team 2022 - Pillersee, Austria
Cool G-SHOCK EXPERIENCE DAYS Team 2022 – Pillersee, Austria

Day One with this very great and yellow piece – Casio G-SHOCK GAE-2100RC-1A Review

G-EXPERIENCE 2022 - Hochseilgarten Pillersee
G-EXPERIENCE 2022 – High Ropes Course Pillersee
G-EXPERIENCE 2022 - Bogenschießen Pillersee
G-EXPERIENCE 2022 – Archery Pillersee

More Details about this two Days here in the Video…

The supporting program demanded everything from us. Looking back at G-SHOCK’s brand profile, it’s hardly surprising that instead of spa treatments and pedal boats, archery, climbing and even canyoning were on the daily schedule.

The watch of the day while canyoning was the Casio G-SHOCK Mudmaster GWG-2000-1A3ER, and it handled the mountain challenges brilliantly. This watch is at home wherever extreme conditions prevail. Be it under water, in the air or in the rock. The survival features are interesting, and their usefulness in actual exceptional situations is not insignificant.

Click here for the other review of the Casio G-SHOCK Mudmaster GWG-2000-1A5ER

So many functions

One way or another, G-SHOCKs have been known for their ruggedness for decades. However, to take the features to the extreme, Casio has come up with a few things. I can’t remember the last time I wore a watch on my wrist with a feature list as long and broad as the Casio G-SHOCK Mudmaster GWG-2000-1A3ER. I’ve also had a handful of outdoor models in watch reviews so far. None has come close to the Mudmaster. The watch comes with a depth and altimeter, for example, which indicates the current altitude in a range from -700 to +10000 meters. Radio signal reception ensures that the Mudmaster is always accurate. This even in 29 possible time zones!

READ MORE:  Hamilton Khaki Field Automatic Chronograph Review
Casio G-SHOCK Mudmaster GWG-2000-1A3ER Review
Photo © 2022 by WATCHDAVID® David Drilling – All rights reserved

In addition, a digital compass, a barometer and a thermometer are of great use. What else do you need to survive? Sure, calendar, stop functions and an alarm. Underwater operations are possible down to a depth of 200 meters. Thus, the Casio G-SHOCK Mudmaster GWG-2000-1A5ER also passes as a diver’s watch. What is still missing so far is a smartphone connection. In nature, the smartphone would clearly rather weaken, but in everyday use I find the control via app sometimes facilitating.

An armored case

Casio G-SHOCK Mudmaster GWG-2000-1A3ER Review
Photo © 2022 by WATCHDAVID® David Drilling – All rights reserved

Casio packs the lush feature set into a robust case. With dimensions of 61 by 54 millimeters, it is probably one of the largest ever. Nevertheless, the Mudmaster is light and comfortable to wear on the wrist. This is due to the weight. The Mudmaster weighs just 105 grams. The case is made of a carbon synthetic resin mixture. Casio has been considered a pioneer in this field for years. Salt water, heat, cold or mud cannot be dangerous for the watch. There is praise for the use of so-called a gel. The silicone mixture encases the quartz movement. Thus, it is protected from shocks and dampers. 

The quartz movement installed inside is powered by solar cells under the dial. Excess energy is stored and can be retrieved when needed. It takes 23 months for the Mudmaster to run out. So it won’t fail because of that. 

Photo © 2022 by WATCHDAVID® David Drilling – All rights reserved

Finally, the appropriate, masculine look should not go unmentioned. The self-proclaimed “master of mud” is edgy and functional. The black GWG-2000-1A3ER is equipped with a khaki-colored synthetic resin strap, which is very comfortable to wear. An excellent price-performance ratio at an MSRP of USD 800,- puts the crown on the Mudmaster.

READ MORE:  Union Glashütte Belisar Zeitzone Review
Casio G-SHOCK Mudmaster GWG-2000-1A3ER Review
Photo © 2022 by WATCHDAVID® David Drilling – All rights reserved

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Casio G-SHOCK Mudmaster GWG-2000-1A5ER Review

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Gallery Casio G-SHOCK Mudmaster GWG-2000-1A3ER

Technical Details

NameCasio G-Shock Mudmaster GWG-2000-1A3ER

Reference numberGWG-2000-1A3ER


Categoryoutdoor watches / sports watch

Price fromUSD 800,-

Warranty2 years

Case Materialcarbon / Resin

Diameter61.00 mm x 54.00 mm

High16.00 mm

Watch Glassmineral glas

Watch TypeQuartz / Solar

Waterproof20 bar (200 m / 660 ft)

Movement NameModul 5678

Functions12 hours counter / 24 hours counter / Alarm / altimeter / compass / date / GMT / hour / Minute / second / Stop-second


Indicesdashes and arabic numerals

Special Featuresdigital display / hands filled with luminous material / indices filled with luminous material / LED indices

Bezelblack / Carbon

Bracelet Colorkhaki

Bracelet MaterialResin

Claspcarbon / pin buckle

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