Casio Men's MTG900DA-8V G-Shock MT-G Atomic Tough Solar Watch

4.5 out of 5 stars 4 customer reviews

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  • Quartz movement
  • Auto receive function (4 times per day), signal: WWVB, Frequency: 60kHz
  • Auto EL backlight with Afterglow, world Time
  • 29 times zones (48 cities), city code display, daylight saving auto on/off
  • Water-resistant to 660 feet (200 M)

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We don't know when or if this item will be back in stock.

Product Specifications

Watch Information
Brand, Seller, or Collection Name Casio
Model Number MTG900DA-8V
Part Number MTG900DA-8V
Model Year 2011
Item Shape round
Dial window material type Mineral
Display Type digital
Clasp Type fold-over-push-button-clasp-with-safety
Case material stainless-steel
Case diameter 44 millimeters
Case Thickness 17 millimeters
Band Material stainless-steel
Band length mens
Band width 24 millimeters
Band Colour silver
Dial colour Grey
Bezel material stainless-steel
Bezel function stationary
Calendar day-date-and-month
Special features luminous
Movement Quartz
Water resistant depth 660 meters
Warranty type Manufacturer

Product Details

  • Shipping Weight: 227 g
  • Item model number: MTG900DA-8V
  • ASIN: B00134L8XU
  • Date first available at May 28 2010
  • Average Customer Review: 4.5 out of 5 stars 4 customer reviews
  • Amazon Bestsellers Rank: #20,065 in Watches (See Top 100 in Watches)
  •  Would you like to give feedback on images or tell us about a lower price?

Product Description

This series set the benchmark for mens metal digital timepieces. Atomic timekeeping, solar power, shock resistant, 200M WR for starters.

Customer Questions & Answers

Customer Reviews

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Top Customer Reviews

Verified Purchase
At last I have a watch that self corrects to atomic time. Although only having it for a couple of months (April and May - with lengthening amounts of daylight at 43⁰ N lat ) the small solar panels keep it fully charged. I am hoping it will work as well during reduced sunlight in winter. The stainless/chrome finish looks nice but I'm thinking now, perhaps the black resin would be less obvious.

May 31, 2014
It has been over a year now and the watch is performing perfectly. I am in the process of getting a black resin atomic solar watch and hopeful for the same results. The process has been delayed by supplier (Area Trend through Amazon) error. Hopefully the new Amazon supplier will fill my order correctly.
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Verified Purchase
Wife got this for me on Xmas, I like it a lot and would recommend to anyone who wants a good looking but tough watch.
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Verified Purchase
More then what I wanted to spend but worth it. The solar is a great idea. DO NOT TAKE TO THE SOURCE TO CHANGE BATTERYS. They told me they can put a battery in it for $4.00 and then proceeded to lose parts, break parts and then saying, OH WE CANNOT CHANGE IT and then returned it in pieceswith parts missing in a bag. Then told me that they wouls replace it,so I bougt another one and got screwed paying for that as well.
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I love this watch . You never have to worry about it. And it can seriously take a beating.I bought it for the time memo feature and use it often. My only gripe is that it is not programmed to accept a Saskatchewan time zone (no time change) so I keep having to change it back and forth.
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Most Helpful Customer Reviews on (beta) HASH(0xa1f97c18) out of 5 stars 513 reviews
174 of 175 people found the following review helpful
HASH(0xa1c6fc54) out of 5 stars Toughest watch I've ever owned Aug. 23 2008
By D. Matheny - Published on
I've had this watch almost 5 years now, so I thought I should sit down and write a quick review of it. I'm the kind of person that tends to break a lot of watches, so it's amazing to me that this watch has lasted this long at all - although the buttons and part of the front bezel have been beat up pretty good.

First, the things I really like about this watch are:
1) Because it sets itself off of the atomic clock in Denver every night, it is completely accurate - the longer I wear it, the more I find myself setting all the other clocks I use by this watch. As a reference, I live in Austin, TX and have never had a problem getting a signal - it also picked up the change in daylight savings when congress decided it needed to change the dates (thanks to the atomic clock).
2) The solar power is also a great feature, I've found that it sits on full power from about March through November each year. Once the days get noticeably shorter, it tends to settle on the second highest battery setting until spring. This doesn't impact the performance at all, but it does give me an idea how much sunlight I'm getting.
3) This thing is completely waterproof and very tough. Believe it or not, I actually throw it in the dishwasher when it gets dirty and it comes out sparkly clean. It's been through some beatings that would have completely destroyed pretty much any other watch and it still works perfectly.
4) I really love the auto-backlight feature. It's very convenient not to have to push any buttons to see the time at night.
5) I also like how easy it is to adjust the time by just changing the timezone whenever I travel.

This wouldn't be complete without a list of things I don't like, so here they are:
1) I really wish this watch had a countdown timer instead of the databank feature. I've found the databank to be pretty useless, but I think I would use a countdown timer quite a bit.
2) Going back to the dishwasher theme, this watch does tend to get pretty dirty since it has some large recessed areas. The reason I even tried the dishwasher in the first place was because it was kind of a pain to clean any other way.

Overall, I really like this watch and would recommend it to anyone. If I ever do manage to break it I will definitely be replacing it with another one of the Atomic-Solar G-Shock models.
136 of 140 people found the following review helpful
HASH(0xa1c70078) out of 5 stars It's very big and shiny, and does it all Feb. 8 2007
By JohnVidale - Published on
Verified Purchase
I surveyed vast field of digital choices before getting the watch a month ago, and I'm well satisfied. Most digital watches (as opposed to analog with hour and minute hands) are ugly, IMO, so my surveying has mainly been frustrating. I found a nice line of digital Casio Edifices, with big digits and glimmering colorful faces, which served for a while, but has apparently been discontinued a year or two ago, and my last one quit working two months ago.

I bought this watch, grimacing at the price, just because it wasn't particularly ugly and had big digits, but it exceeded my meager expectations. The manual was a bit of a slog - it took about 20 minutes to read, but well worth it.

The features are outstanding - about 5 alarms, one of which can be set for snooze alarms, the expected stop watch, easy access to Greenwich Meridian Time, markers for noting times, a backlight, waterproof enough for scuba diving (not that I dive).

The special features include checking with a radio signal daily so the time is always correct (important for catching my buses and winning arguments about what time it really is), solar power (so run-down batteries should never be a problem), and backlighting that turns on when one turns one's wrist (surprisingly convenient). A nice touch is when one cycles back to the time, the watch gives a different unobtrusive beep.

There are other features available on other watches - tape recorders, flash drives, altimeters, compasses, but none that sound remotely useful in the long run.

I had to shorten the well-built wriststrap by 5 or 6 links, a little tricky, but any watch shop could do it in 5 minutes.

If you want a big, full-featured, easy-to-read and operate digital watch, this is the one, and I've surveyed most of them.

Post originally written mid-January, this added 2-25-07: I've found there might be problems with battery life, or maybe it is just the Seattle winter. I've had to leave my watch sometimes under a light when the power get low, and changing the battery can only be done by Casio, according to one watch shop. Also, the price on the watch is coming down quickly to more reasonable levels. I still like it a lot, despite having to juice it up from time to time.
135 of 140 people found the following review helpful
HASH(0xa1c704a4) out of 5 stars Not Perfect, But Close Aug. 5 2008
By John S. Johnston - Published on
I bought my Casio MTG900DA-8V over four years ago, and I was surprised to find it still being produced and sold by Casio as I browsed Amazon's watch selection.

Overall, I think it is a great timepiece, and I have never regretted buying mine. But, you will notice that I only gave it four stars, because like anything made by man, it isn't perfect. Here's the scoop:

1. Superb accuracy. I live near Atlanta, Georgia, which is probably close to the limit of this watch's radio reception range. But even here, my watch will sync with the atomic time station over 99% of the time. But as another reviewer said, you will probably have to experiment with locations within your house where you leave the watch for its overnight radio sync process.

2. Not just water-resistant, this thing is waterproof. I have worn mine while doing all kinds of nasty chores, including mowing, weeding and related dirty jobs. And when I get in the shower afterward, I just leave the watch on so that it gets a good clean-up, too. Never a problem.

3. Very tough. Again, I've worn mine doing some pretty harsh work, including using a chain-saw, axe and hammer. Never a problem.

4. The solar power is great. Some people may think that solar power is a gimmick, but here's the deal: since you should never have to replace a battery, your water-resistant (or waterproof) watch will stay that way. All my previous watches, including some pretty expensive ones, lost their water-resistance after they had a battery change. (Casio does say that their rechargeable batteries may need replacing some day, but mine are still going strong after more than four years.)

1. This watch is BIG. It is about 15mm thick and is about as big around as the old-style silver dollars. If you have a small wrist, this watch may not be for you.

2. The band and SOME of the bezel appear to be stainless steel. After four years, the stainless steel parts of my watch still look OK, even after the hard life my watch has had. But, the stainless steel band is connected to the watch with a big final link that appears to be made of some type of plastic (or "resin" as Casio likes to call it). This plastic has held up well, but it has faded in color somewhat. Also, there are what appear to be anodized aluminum parts decorating the four corners of the bezel. The anodized surface of the aluminum has begun to wear off, leaving these aluminum parts looking somewhat mottled.

1. My Casio MTG900DA-8V has had four years of very hard use. It is as accurate as ever, all the features work as advertized and I am still wearing it every day.

2. But keep in mind, if you give it the kind of rough use that I have, it will probably develop some cosmetic issues.

3. If you are looking for a rugged, super accurate digital timepiece, look no further. This is the one.
26 of 27 people found the following review helpful
HASH(0xa1c6fde0) out of 5 stars Great hi-tech watch Oct. 19 2005
By Pierre Lavallee - Published on
I bought this watch 2 years ago, and it has been working flawlessly since then. I have many watches, some automatics - they look great but have very few functions and require attention. The great thing about this G-Shock is that it is totally maintenance-free: you just put it on and forget about it.

PROS: No need to replace battery, perfect accuracy, no need to set time & date ever (even for Daylight Saving Time or leap years), no need to take it off (WR200 meters, indestructible), can wear with any clothes (Stainless steel bracelet), auto night-light, handy functions (alarms, GMT, chrono).

CONS: Huge watch - not heavy but reaaaaally large. No countdown timer (one of the most useful functions IMO).
35 of 38 people found the following review helpful
HASH(0xa1c70474) out of 5 stars Tough Watch July 31 2006
By H. Fowler - Published on
I've had the G-Shock MTG900DA8 for a few weeks now. I've never worn watches before but the lack of an exterior clock on my latest cell phone forced me to get one. After doing some research on watches I decided that a G-Shock would give me the right combination of function, toughness, and looks. I don't think I could've picked a better watch.


Solar Power: There are 3 charge indicators: high, medium, and low. When I got the watch it was on medium. I put it on the dash in my car for about an hour and it moved to hi. I haven't had to do that again and it has never moved from hi. The solar power actually works. It's pretty cool. Makes me wish my car worked that way.

Atomic Time Keeping: Yep, it's atomic, and yep, it works. I think by default it tries to connect to the atomic clock in Colorado 3 or 4 times a day. My watch always manages to sync while I'm sleeping at around 5 in the morning. I've been on a couple of trips and no matter where I've gone (in Texas) it has been able to sync itself at least once everyday. It's cool knowing that no matter what that the time is exactly right. I've even compared it to other atomic clocks (and our servers at work which are synced to atomic clocks). Not only do they all have the same time but they are the exact same down to the seconds. Pretty cool.

Tough: I do computer work in a manufacturing plant and, unfortunately, I've beat the heck out of this watch in the few weeks I've had it. But you couldn't tell by looking at it. This thing is tough. It still looks brand new and shiny. It really lives up to it's name.

Looks: This watch looks great on my wrist. I was afraid it would be too big or too heavy but it's neither. I don't think I have particularly big arms either. Plus it's a nice combination between tough and functional and classy looking.

Other Features:

It's easy to remove links from this thing when you get the hang of it (you just need a teeny, tiny, flat head screwdriver).

The Indiglo light is just bright enough and being able to flip your wrist toward yourself in a dark area and have the light come on is neat.

The display on the watch (even in bright noonday Texas sun) is easy to see. I've never had to struggle to read what time it is.

It's is very light for it's size. I was afraid it was going to be real heavy but that hasn't been the case. It's surprisingly light.

The clasp is very easy to do and undo but I've also never had it get undone when I didn't want it to.

Being able to hit a button and set the watch to different time zones works great. I haven't needed to use it yet but I'm sure I will and knowing that I can is cool.

When - wait, IF this watch ever dies (and I could see it lasting for 10 years or more) I will definitely get another G-Shock. Good game, Casio.