---
product_id: 946915
title: "G-Shock Solar Atomic Rescue GW7900B Black/Black One Size"
brand: "g-shock"
price: "¥9694"
currency: JPY
in_stock: false
reviews_count: 7
url: https://www.desertcart.jp/products/946915-g-shock-solar-atomic-rescue-gw7900b-black-black-one-size
store_origin: JP
region: Japan
---

# 200m water resistance, marine ready Atomic time sync, ultra-precise Solar-powered, no battery hassle G-Shock Solar Atomic Rescue GW7900B Black/Black One Size

**Brand:** g-shock
**Price:** ¥9694
**Availability:** ❌ Out of Stock

## Summary

> ⏱️ Own Time Like a Boss — Solar-Powered Precision for the Modern Trailblazer

## Quick Answers

- **What is this?** G-Shock Solar Atomic Rescue GW7900B Black/Black One Size by g-shock
- **How much does it cost?** ¥9694 with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.jp](https://www.desertcart.jp/products/946915-g-shock-solar-atomic-rescue-gw7900b-black-black-one-size)

## Best For

- g-shock enthusiasts

## Why This Product

- Trusted g-shock brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Global Time Mastery:** Atomic clock syncing across 31 time zones keeps you perfectly punctual worldwide.
- • **Always Visible, Always Ready:** EL backlight and intuitive controls ensure you never miss a beat, day or night.
- • **Endless Power, Zero Downtime:** Harnesses solar energy to keep you moving without battery swaps.
- • **Rugged Elegance Meets Function:** Sleek black resin case with shock resistance and a mineral dial window built to last.
- • **Tide & Moon Graphs for the Adventurer:** Stay ahead of nature’s rhythms whether at sea or on land.

## Overview

The G-Shock Solar Atomic Rescue GW7900B is a robust, solar-powered sport watch featuring atomic timekeeping for unmatched accuracy. Designed with a 50mm black resin case and mineral dial window, it offers water resistance up to 200 meters, making it ideal for serious water sports and professional marine activities. With world time across 31 time zones, tide and moon graphs, a 1/100-second stopwatch, and an EL backlight, this watch blends rugged durability with sophisticated functionality tailored for the active professional.

## Description

Casio G-Shock MB-6 GW7900B-1 Atomic Solar Rescue Multi-Band 6 Wristwatch With the multifunctional Casio Men's G-Shock Solar Atomic Black Digital Sport Watch, you'll finally be able to mix business with a little athletic pleasure. The case and bezel are both made of black Resin, tailoring to your more sophisticated side by offering a sleek look and smooth feel. Four large silver screws accent the top and bottom of the bezel, which displays blocky white words depicting the four button functions. The dial hosts five subdials depicting time, date, and even tide charts for the boating enthusiast. Easy-push buttons on the case allow you to quickly go through your settings and work the handy stopwatch feature, while a soft EL backlight provides you with access to the time, regardless of where you and your watch are. The wide band also consists of black Resin, closing with a silver buckle for a custom fit. This sporty timepiece is water resistant up to 660 feet (200 meters), relies on Japanese quartz movement, and boasts Casino's shock-resistant technology. P.when('A').execute(function(A) { A.on('a:expander:toggle_description:toggle:collapse', function(data) { window.scroll(0, data.expander.$expander[0].offsetTop-100); }); }); CasioWith the launch of its first watch in November 1974, Casio entered the wristwatch market at a time when the watch industry had just discovered digital technology. As a company with cutting-edge electronic technology developed for pocket calculators, Casio entered this field confident that it could develop timepieces that would lead the market.Today, Casio is focusing its efforts on solar-powered radio-controlled watches: the built-in solar battery eliminates the nuisance of replacing batteries, atomic timekeeping means the users never have to reset the time. Recently, Casio launched a series of Bluetooth watches that sync to the users cell phone to automatically update the time. Casio is always moving time forward. See more

Review: Great upgrade from Timex Ironman - I bought this watch to replace a Timex Ironman that died after a few years of service. I liked the Timex because of its low price, huge display, and very easy to use all of the watch functions. I've had the Casio GW7900B-1 watch for about a month now and I don't miss my old Timex one bit. There are several comments about the inverse display being hard to read, but I find it easy to read in any lighting conditions. I would say that you have to use the backlight a little more than you would on a traditional display (for example a little earlier at dusk), but that's just a new habit to get used to. With the backlight on you can read it fine under low light conditions. The backlight actually seems brighter than what I had on my Timex. Display of numbers is not as big as on the Timex (nothing out there really is), but this watch shows more information and the display is big enough that I don't have any problems reading it. It is very easy and intuitive to use all of the features on the watch. Maybe not quite as simple as the Timex, but pretty darn close, and you have more features like moon and tide info on this one to learn how to use. Read the user's manual one time and you'll understand how to use everything. Obviously the price of this watch is more than the Timex, but this watch is built like a tank and I think it will last forever. I also think it is more attractive than the Timex. I wear it to work (office job) and people have told me "nice looking watch." It is a large watch, but looks good and is comfortable to wear. The watch battery power indicator has been on full ever since I received it. I work in an office all day under fluorescent lights and am outside an hour or two in the evenings, plus outside more on weekends. That seems to be enough to keep it fully charged without doing anything special. Time sync with atomic clock signal has worked perfectly every night and even automatically adjusted for daylight savings time. I leave the watch sitting on my dresser when I go to bed and it syncs without any special effort required. I live in Colorado, so I am close to the source of the atomic clock signal in Ft. Collins. As others have mentioned, the screws on the front face are there just for looks. You can move them around with your fingers, but it doesn't seem like they are going to fall out or anything. Overall, this is a great watch and I am looking forward to having it for many years.
Review: Great Casio Watch - In all this watch did not disappoint in any way. There are a few complexities with it but those are to be expected of a watch in this price range. I was looking for a watch to replace the G-Shock I lost a long time ago when I was 15. I had it for literally 6 years when it was ripped off my wrist while I was sailing. The strap was cut through and the watch dropped into the ocean. It is probably still sitting there telling the time as we speak... PROS -A great sturdy watch, rubber coated exterior bug rugged buttons thick straps metal clasp. -A great look, I could wear this with a polo and jeans or a nice suit if I really wanted to.It is a clean crisp rugged looking watch. -it is waterproof, shock resistant, and everything else you could possibly want. -IT IS SOLAR POWERED! Yes that is right solar powered. Say good bye to having a dead watch. That was the one thing I disliked about my original Casio so much; when it went dead it took me a week to get the battery replaced. No more! -The solar panels are well hidden, unless you are looking for them you will NOT find them. They are hidden into the design of the watch quite well. -I have had this thing for a few months now and can say with confidence it has never dipped below the HIGH charge mark. I don't even have to change the way I normally wear a watch either. It just seems to glean every bit of spare solar energy it can get and uses it all to charge the battery. -The manual is well written and flows easily from one function to another CONS -It is not bulletproof...but is likely bullet resistant knowing its construction. -The MANUAL...Dear sweet lord the manual is intense. It is the size of a small travelers bible that you can put easily in your pocket. And it is just about as thick as one if not thicker. This thing has more functionality than any other watch I have ever owned...while that isn't saying much if you plan on using ANY advanced functionality of this device you need to read the manual. -The display can be a bit challenging to read in the dark if you do not light the face up. Good news I found if you quickly twist your wrist like you want to read the time, when it is dark the face auto lights up for you. It does not however do this when it is bright enough to read the face during the day. it is almost like it has a light sensor in it and will only auto light up when there isn't enough light to read it alone. WRAP-UP As far as the line of Casio watches goes this one was a good pick for me. I have a big arm and well a HUGE wrist; this watch fit perfectly and looks great. It is rugged enough for me not to have to worry about taking it hiking, biking, or accidentally hitting it against something while walking or running. They just don't make watches like this anymore...or I thought they didn't.

## Features

- Solar-powered sport watch featuring atomic time keeping, world time in 48 cities, and EL backlight
- Features 1/100-second stopwatch, daily alarm with snooze, 12- and 24-hour formats, tide/moon graph, 31 time zones, and day/date/month calendars
- 50 mm resin case with mineral dial window
- Japanese quartz movement with digital display
- Resin band with buckle closure
- Water resistant to 200 m (660 ft): In general, suitable for professional marine activity and serious surface water sports, but not scuba diving.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN  | B00309HQPK |
| Batteries  | 1 Lithium Metal batteries required. (included) |
| Best Sellers Rank | #1,216,818 in Clothing, Shoes & Jewelry ( See Top 100 in Clothing, Shoes & Jewelry ) #5,534 in Men's Wrist Watches |
| Customer Reviews | 4.5 4.5 out of 5 stars (2,453) |
| Date First Available  | December 8, 2009 |
| Department  | mens |
| Is Discontinued By Manufacturer  | No |
| Item model number  | GW7900B-1 |
| Manufacturer  | G-Shock |
| Product Dimensions  | 4 x 2 x 2 inches; 2.5 ounces |

## Images

![G-Shock Solar Atomic Rescue GW7900B Black/Black One Size - Image 1](https://m.media-amazon.com/images/I/31n2Dv7exhS.jpg)
![G-Shock Solar Atomic Rescue GW7900B Black/Black One Size - Image 2](https://m.media-amazon.com/images/I/41mEsZOZUJL.jpg)
![G-Shock Solar Atomic Rescue GW7900B Black/Black One Size - Image 3](https://m.media-amazon.com/images/I/612nyor1ebS.jpg)
![G-Shock Solar Atomic Rescue GW7900B Black/Black One Size - Image 4](https://m.media-amazon.com/images/I/71iVmfuZPgL.jpg)

## Questions & Answers

**Q: Does this watch receive a time signal in Asia and Europe**
A: I had one in Afghanistan that did not. However I just set it for Kabul time ( one of the features) and it stayed accurate for a 8 month deployment. Not sure about Europe.

**Q: "Casio Men's GW7900B-1 why is my background grey with black letters ?" and can I change to black background with grey letters I bought it duty free**
A: Hi,The Casio G-Shock  GW-7900B should have on its steel back plate, "GW-7900B" and a box with 3200 (module number).Maybe yours has "GW-7900"  and 3193 instead ?Regards,

**Q: does this have auto El**
A: Yes it has auto EL, it can be set to manual or auto.

**Q: does it has in built battery  even though is solar**
A: Yes it has a battery and yes you have to 'and can easily' replace it. It's about 13 bucks here on Amazon. Bought one yesterday. The one in it lasted for about 6 years.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Great upgrade from Timex Ironman
*by J***S on March 17, 2011*

I bought this watch to replace a Timex Ironman that died after a few years of service. I liked the Timex because of its low price, huge display, and very easy to use all of the watch functions. I've had the Casio GW7900B-1 watch for about a month now and I don't miss my old Timex one bit. There are several comments about the inverse display being hard to read, but I find it easy to read in any lighting conditions. I would say that you have to use the backlight a little more than you would on a traditional display (for example a little earlier at dusk), but that's just a new habit to get used to. With the backlight on you can read it fine under low light conditions. The backlight actually seems brighter than what I had on my Timex. Display of numbers is not as big as on the Timex (nothing out there really is), but this watch shows more information and the display is big enough that I don't have any problems reading it. It is very easy and intuitive to use all of the features on the watch. Maybe not quite as simple as the Timex, but pretty darn close, and you have more features like moon and tide info on this one to learn how to use. Read the user's manual one time and you'll understand how to use everything. Obviously the price of this watch is more than the Timex, but this watch is built like a tank and I think it will last forever. I also think it is more attractive than the Timex. I wear it to work (office job) and people have told me "nice looking watch." It is a large watch, but looks good and is comfortable to wear. The watch battery power indicator has been on full ever since I received it. I work in an office all day under fluorescent lights and am outside an hour or two in the evenings, plus outside more on weekends. That seems to be enough to keep it fully charged without doing anything special. Time sync with atomic clock signal has worked perfectly every night and even automatically adjusted for daylight savings time. I leave the watch sitting on my dresser when I go to bed and it syncs without any special effort required. I live in Colorado, so I am close to the source of the atomic clock signal in Ft. Collins. As others have mentioned, the screws on the front face are there just for looks. You can move them around with your fingers, but it doesn't seem like they are going to fall out or anything. Overall, this is a great watch and I am looking forward to having it for many years.

### ⭐⭐⭐⭐⭐ Great Casio Watch
*by R***R on December 24, 2012*

In all this watch did not disappoint in any way. There are a few complexities with it but those are to be expected of a watch in this price range. I was looking for a watch to replace the G-Shock I lost a long time ago when I was 15. I had it for literally 6 years when it was ripped off my wrist while I was sailing. The strap was cut through and the watch dropped into the ocean. It is probably still sitting there telling the time as we speak... PROS -A great sturdy watch, rubber coated exterior bug rugged buttons thick straps metal clasp. -A great look, I could wear this with a polo and jeans or a nice suit if I really wanted to.It is a clean crisp rugged looking watch. -it is waterproof, shock resistant, and everything else you could possibly want. -IT IS SOLAR POWERED! Yes that is right solar powered. Say good bye to having a dead watch. That was the one thing I disliked about my original Casio so much; when it went dead it took me a week to get the battery replaced. No more! -The solar panels are well hidden, unless you are looking for them you will NOT find them. They are hidden into the design of the watch quite well. -I have had this thing for a few months now and can say with confidence it has never dipped below the HIGH charge mark. I don't even have to change the way I normally wear a watch either. It just seems to glean every bit of spare solar energy it can get and uses it all to charge the battery. -The manual is well written and flows easily from one function to another CONS -It is not bulletproof...but is likely bullet resistant knowing its construction. -The MANUAL...Dear sweet lord the manual is intense. It is the size of a small travelers bible that you can put easily in your pocket. And it is just about as thick as one if not thicker. This thing has more functionality than any other watch I have ever owned...while that isn't saying much if you plan on using ANY advanced functionality of this device you need to read the manual. -The display can be a bit challenging to read in the dark if you do not light the face up. Good news I found if you quickly twist your wrist like you want to read the time, when it is dark the face auto lights up for you. It does not however do this when it is bright enough to read the face during the day. it is almost like it has a light sensor in it and will only auto light up when there isn't enough light to read it alone. WRAP-UP As far as the line of Casio watches goes this one was a good pick for me. I have a big arm and well a HUGE wrist; this watch fit perfectly and looks great. It is rugged enough for me not to have to worry about taking it hiking, biking, or accidentally hitting it against something while walking or running. They just don't make watches like this anymore...or I thought they didn't.

### ⭐⭐⭐⭐⭐ Review
*by S***R on March 17, 2019*

Absolut Top

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*Product available on Desertcart Japan*
*Store origin: JP*
*Last updated: 2026-02-02*