Casio Men's 'G Shock' Quartz Stainless Steel and Resin Casual Watch, Color:Black (Model: GST-S100G-1BCR)

  • Tough solar powered, shock resistant, 200-meter water resistance, neobrite, double led light, world time, 31 time zones, second stopwatch, countdown timer, 5 daily alarms
  • Hourly time signal, hand shift feature, battery level indicator, power saving, full auto-calendar, 12/24-hour format, button operation tone on/off, regular timekeeping
  • Quartz Movement
  • Case Diameter: 59.1mm
  • Water resistant 200m (660ft): in general, suitable for professional marine activity and serious surface water sports, but not diving

Product description

Constantly in pursuit of practical durability, Casio G-Shock created its G-Steel line. Using the concept of "Layered Toughness," this collection combines the shock resistance and strength of their G-Shocks with a stylish, steel body. This newer addition to the G-Steel family features a black resin band and bezel for a masculine build. The black bezel and dial with the layered sub-dials and hour makers gives the watch a three dimensional look that adds depth and impact to the face. Featuring world time for 31 different time zones, 5 daily alarms, a full auto-calendar, a battery level indicator, and a power saving mode, this watch is skillfully built with useful and practical functions that keep the thrill seeking traveler on time for his adventures. This watch also boasts a double LED light, one for the face and one for the digital display, for easy visibility after dark. Completing the look is a black resin strap that comfortably secures the watch to its wearer.

  • 59mm black case
  • Black bezel
  • Black analog-digital dial with three subdials, stick indices, and hands
  • Shock Resistant
  • 200meter Water Resistant
  • Solar Powered
  • World Time 31 time zones (48 cities + UTC), city code display, daylight saving on/off
  • 5 Daily Alarms
  • 1/100 second stopwatch that measures elapsed time and split time
  • Countdown timer
  • Full auto-calendar
  • Double LED light: LED light for the face and LED Backlight for the digital display
  • Black resin strap
  • Casio Style#: GSTS100G-1B

With 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.

Customer Reviews

Getting tons of sperm donor requests
I've already had 3 women ask me to impregnate them while wearing this watch. One woman randomly showed up on my doorstep holding a tickle feather. She requested that I use it on her whilst telling her the time in 13 different countries. I had to decline as my allergies were acting up that day, and I'm married.
I can recommend this watch.

If you have the cash, go for it.
I don't have any complaints about this watch. I owned Fossil, Bulova, Seiko, and Timex watches.

First off, the watch's weight on the wrist is solid yet convenient for continous use. It's like wearing a well-designed hiking backpack -- you'll always feel it on you, but it is comfortable and doesn't hinder your body motion.

Readability of the watch's digital layouts is 8/10. In most circumstances, you can clearly read what is displayed. In very dim settings, you may have to angle the watch to see the digital layouts clearly. In the dark, you will need to use light button.

Setting up the watch with all of its functions (time, daylight savings, date, alarm, power saving, mute/beep, 12-hr/24-hr) is easy per following instructions by manual. It took me about 10 to 20 minutes for me to fully set up my watch. Anyone from children to elderly can do it as long as they follow the instructions provided in the box. Instructions include flow-chart and illustrations of the watch in various mode settings.

Everyday use of the watch, provided that you do not cover the watch with a long-sleeve shirt or jacket, will ensure high enough charge level for the watch to operate normally for a very long time (at least 2 years but much longer on average). As the watch is exposed to sunlight, indoor lighting, or any glare from various light sources like TVs or campfires, the battery will have sufficient power. Even after years of use with the same battery, I would estimate that as long as it gets exposed to a few hours of light per day, it should be be operational for at least 20 hours.

You'll definitely notice power failure if the watch is stored away from any light for a long time (several days to a month).

Durability is good. It isn't fragile, obviously. The one thing to watch out for is removing the watch whenever you get into a Jacuzzi, bath, shower, or will be interacting with hot water (100°F or more) in any manner. It is not likely that you will see any damage or difference while wearing the watch in hot water but the chances of damage to the watch's digital layouts and internal machinery is still significantly higher than if you kept the watch away from hot water.

To check for authenticity of your watch, it should have CASIO placed on both sides of the watch, along with a module number on the back of the watch that matches the watch's instruction manual that it came with. Fake G-Shock watches generally have a fixed module number (same number for several fake watches) and the instructions manual won't indicate any module number at all or have a module number that doesn't match the watch.

You can further check the authenticity of the G-Shock by setting the "Auto-light" system on (when you turn your watch towards your face, the watch will turn on the light automatically) and testing it. True G-Shock watches will turn the light on by itself if you move the watch to face you. Fake G-Shocks may not even have this option available to set and it will not be able to illuminate the watch automatically by itself when you turn the watch to face you. **Fake G-Shocks will still have a light to use that can be activated by pressing a button but it will NOT ever come on automatically**

It is worth the money for a durable, solar-powered, handsome looking watch. It can match with almost everything you wear and can be used in casual settings, a professional environment, and dress-up occasions.

Buy it
First time GShock purchase and it’s exactly as I had hoped. Picked this model for simplicity and versatility (office to the beach). Very lightweight construction, not cheap just not the 2lb bricks I’m used to. I was initially concerned over the band size as I have 8 1/2” wrists and I can assure you this watch will not pose issues for the big boys - I still have 3 additional size-slots. Love the stainless steel and composite combination - if this withstands the test of time I will be purchasing more from this series.