CASIO GWG-2000-1A1JF [G-Shock Carbon MUDMASTER Radio Solar Triple Sensor]Shipped from Japan

The Casio GWG-2000 is almost certainly more watch than the average person needs, but it sure is fun to have on your wrist. It’s simultaneously beefy and elegant and could almost pass for a dress watch if not for its comparatively massive size. This watch is loaded with features with the star of the show being the triple sensor. I have found that the barometer and compass are both very accurate when compared to real-time NOAA data and a handheld magnetic compass. The thermometer is also dead-on accurate so long as you’re not wearing the watch where it is affected by your body heat – the manual recommends removing the watch from your wrist for 20-minutes before taking a temperature reading. The altimeter is more finicky because the altitude is estimated using air pressure which frequently changes, so you’ll need to recalibrate it to a known altitude measurement before setting out on a trip. There are the standard digital watch features like a stopwatch which can run for 24-hours, and a countdown timer which is inexplicably limited to a mere 60-minutes. You get five different alarms along with an hourly signal; however, G-Shock watches have infamously quiet sounders due to their thick cases, and the GWG-2000 is no exception. In fact, I can’t hear it beeping unless I hold it up to my ear. For less than ideal lighting conditions, there is a bright LED mounted at the six o’clock position which does an excellent job illuminating the watch face, and the lume when fully charged remains readable all night even as it dims. Solar charging continuously recharges the battery when exposed to any bright ambient light source, so you never need to worry about battery changes. And, finally, there is a world time mode for independently tracking a second timezone along with automatic atomic clock time syncing via a radio signal which I have confirmed keeps the watch accurate to within a fraction of a second. I find the GWG-2000 to be reasonably lightweight and comfortable on the wrist despite its large size. The stock strap is somewhat unyielding, but it can be replaced with a variety of aftermarket straps using a pair of inexpensive third-party adapters (I recommend JaysAndKays). The buttons are large and textured making them easy to locate and press, and the addition of a crown on the right side allows for reasonably intuitive operation given the number of features. Basically, select a mode, pull the crown outward to enable settings, use the lower left button to select the setting you wish to change, give the crown a spin to select, then press it inward to finish. The watch also features a single LCD display rather than having information spread across multiple windows, which I appreciate, and while negative displays are often difficult to read, the LCD on the GWG-2000 is bright, clear, and legible even in low light. It's not a perfect watch, but it comes close. If you need something with a clearly audible alarm, then this is probably not the watch for you. If you're fine with pretending the alarm feature doesn't exist (or you have better hearing than me), then the GWG-2000 has a lot to offer, and being a G-Shock, it's designed to take a beating that would break any other watch. Considering Casio’s recent design trends, it’s also likely to be one of their last high-end watches that doesn't require a Bluetooth connection and privacy invading phone app for full functionality, so get it while you still can. Update 2/18/2026: I ended up returning this watch because I found that the grey hour and minute hands were occasionally hard to see against the darker grey watch face. 95% of the time the watch is perfectly legible, especially in bright light, but that remaining 5% proved frustrating as I would have to study the watch for several seconds to locate the hands. The brightest thing on the watch face is the white mode indicator which is always annoyingly visible even when the hands are not. I exchanged the 1A1 model for a 1A3 which has white hands and is far more legible under all lighting conditions.

This is great watch. It is big, but wears well and is light. Easy to set up and very durable.

Seller was very prompt and item was packed very well. I will strongly endorse this sellers service. As far as the watch is concerned, it checks all the vital buttons. This is a set it and forget it type of item. Once set (which is very easy) it charges itself in the sun (or artificial light), every night it gets the atomic time signal via radio waves; it will adjust for DST, it monitors barometric pressure..... I could go on and on but you get the point. It is deceivingly light but strong due to the carbon fiber used in it's construction. Very comfortable and very attractive on your wrist. I have no hesitation in wearing this with whatever I happen to be wearing for the day. Still a rather expensive watch, but truly a strong value proposition.

True Masterpiece

Absolutely beautiful watch. I’ve wanted one of these for years. It said 54mm and I expected to be bigger than my other mudmaster. It wasn’t. However, seems more secure or solid if that makes sense.

Quick note: Buyers beware that this watch is advertised as a Japanese version, but it is NOT. Disappointingly, the seller sent me the Middle Eastern version instead. Review: A little pricey for a Casio, but the discount helps. Nonetheless, this is a really well made quality watch though. It's robust and rugged for sure. Good features and has almost everything you would want in a rugged G-Shock, but I do wish it also has sunrise/ sunset readings, which I often refer to when I take photos during those golden hours. Besides from that, the watch is pretty great. Very premium. Very quality. I have a small wrist size at 6.5", but I personally like bigger chunkier watches, so this watch sits beautifully!

I bought my first G-Shock ever back 4-5 years ago, the Mudmaster GG1000 and loved it lol abused it with water, oil, dust etc and it with stood all that tortured, I expect the GWG 2000 to do that, plus more. First major selling point for me was the fact that it's Solar powered which is great for obvious reason. Watch arrived from Japan in a really nice black box with the words " G-SHOCK in silver color and all the booklet and instructions in Japanese. Watch looks really beautiful in person lol pictures and youtube videos do no justice, really comfortable watch. Will not go into details about the watch ( Youtube it) but over all, you can not go wrong with a G-SHOCK.

Love it

Ima gshock super fan but this mudmaster pushed me harder into Gshock fanboy status, it is the best watch i have ever worn

I am pleased with this watch. It has already outlived the previous two watches I had, and it still looks as good today as it did the day I received it. As a plumber and avid outdoors man, this watch has been treated to all types of impacts, scratches, and substances like motor oil, grease and dirt, diesel and gasoline. My Cane Corso has chomped down on it countless times and the sapphire crystal lens is still brilliant and flawless. The features like temperature, barometer, and compass have all served me while sailing. The automatic time adjustment works, even though I live in the Northwest Territories. I will buy another Casio G Shock.

マッドマスター最高です。 プロトレックもいいんですが、特に最近のモデルはゴツさが足りない。仕事柄秒針が要るためG-SHOCKのデジタル表示だけでは使いにくい。またクロノグラフも何本か持ってますが、メインの秒針が12時方向で止まっていて、ボタン押すというワンアクションが面倒。マッドマスターの秒針は普通の時計と同じく常に動いている点が◎。 最高の防塵防水性能に、電波ソーラーで時間合わせ不要、長期間電池交換の心配もなし。バイク移動中にスマホ切れても、方位計付きと何かと頼りになります。 価格は安くはないですが、サファイアガラスで10年使えると思えば安い。安心のAmazon正規品購入でポイント還元され結局最安値で購入出来ました。

以前はApple Watch Ultra (49mm) をしていました。 大きい腕時計が好きなのもあって、もっと大きいUltraが出るのを期待しました。が、その気配がないためチェンジしました。 この時計は61.2 × 54.4 mm あるため、体感は確かにでかいです。しかしその反面、こんなものか...とも思いました。ただこれ以上見た目が良い＋大きいのは見当たらないのでひとまず買ってみました。 ゴツさはすごいです。 ボタンは色々あって覚えるの面倒だなーと思いましたが、パターンもそこまでないので興味がある人であれば意外とすぐ覚えれます。 大きいボタンはLEDが付きます。設定で暗い時に腕を傾けるとオートライト (1.5秒 or 3秒) も設定できます。 タイマーは竜頭を引き延ばして設定しないといけないため、Apple watchと比較すると若干面倒にはなりましたが、タイマーやストップウォッチはあるとなしでは全然違うのでひとまず安心。 スマホ連携のある実質上位互換の「GWG-B1000」とも迷いましたが、数字の3と9の表示がなかったりというのもあって見送りました。スマホ連携も便利ではありますが、なんでもかんでもスマホというのも面倒になったので、単体で動くものが欲しかったと言うのもあります。充電も家の光や太陽光でほぼ一生動きそうなため、よほどのこと (※) がない限りずっと使い続けそうです。 ※ Apple Watch 60mm、70mmとかで丸いタイプとか出たら.......戻ってもいいかな........ 強いて気になった点を言うなら、バンド100%がピッタリとフィットしないこと。 ですがなれますし、バンドが初期硬いこともあって馴染んできたらある程度は馴染みます。

Awesome watch! Wear daily. Awesome features.