In 1983 Casio released the first G-Shock  watch. At a time when thin, delicate watches were the fashion, the G-Shock was a tough, rugged looking watch. The company marketed the watch as being able to withstand a fall from the top of a building and still operate perfectly. The G-Shock was ahead of its time, and though it did not take off immediately, within a decade the style skyrocketed to popularity. Today the G-Shock has become Casio's most recognizable watch.

• The name G-SHOCK has stood for power, robustness and innovation for 25 years. The GWM850 is one of the range of G-SHOCK with a stopwatch measuring with an accuracy of 1/1000 seconds.
• Complex watch technology within the smallest space, protected by a housing architecture that absorbs strokes and impacts like a real shock buffer: Before serial production every watch model proves that it can pass the so called "Tough Tests": the hard bounce, the shake test, the relentless water pressure.
  
• The extreme tough look of the GWM850 is also caused by the cool designed wristband with a furrowed texture, inspired by high-tech materials.
• Features:
• Full Auto EL Backlight... Automatically deactivates the Auto EL backlight function when surrounding light is sufficient, and activates it under dim light or dark conditions.
• Shock Resistant
• Solar Power
• DCF/MSF/WWVB/JJY/BPC-radio signal reception.....Whether in Europe, North America and Japan or in the outer reaches of Canada, Central America and China – once the watch has been set to the local time, it receives the relevant signal and shows the correct time wherever you are. In many countries, it also sets itself automatically to summer and winter time.
• LED-Indicator (Display Flasher)... A light diode flashes as soon as an alarm, a countdown-time or the hour signal has been reached.
• World Time... Displays the current time in major cities and specific areas around the world.
• Stopwatch function (1/1000 - 24HR)....Accurate measurement of elapsed time with the touch of a button. The fraction indicates the unit of measurement, while the time figure indicates the maximum time measurement.
• Rally Timer...Keep track of time. In rally sport, every second counts: The rally timer can help you reach the goal within a predefined time. Two functions (stopwatch and countdown timer) work alongside and are displayed simultaneously on the display. While the stopwatch measures the passing of time, the countdown timer shows how much time is left from the start to reach the goal within the predefined time. An acoustic signal will sound every second for the last 10 seconds until the countdown time runs out.
• Timer - 1/1 min. - 24 hours.... For fans of precision: the countdown timers help you to remember specific or recurring events by giving off an audible signal at a preset time. The time can be set to the nearest minute and up to 24 hours in advance. Ideal for people who need to take medicines every day or those who do interval training.
• 5 Multi Alarm, Hourly Time Signal...This model is equipped with 5 independent  multifunctional alarms. One of these alarms is a snooze alarm. This clock has the perfect alarm for any type of appointment. The model is equipped with a total of four repeat alarms: 1. Daily alarm, sounds at the same time each day, 2. Date alarm, e.g. to help you remember birthdays, 3. Monthly alarm, sounds on the same day at the same time each month, 4. Alarm for every day of a particular month.
• Snooze Feature
• Battery Level Indicator: Indicator shows the current battery level.
• Full Auto Calendar
• 12/24-hour Timekeeping
• Water resistance classification (20 bar / 200m).... Perfect for free diving without scuba gear: the watch is water resistant to 20 bar / 200 metres. The metres value does not relate to a diving depth but to the air pressure used in the course of the water resistance test. (ISO 2281)
• Mineral Glass: Hard glass resists scratching.
• Stainless steel resin case.
• Resin Band.
• Approximate Dimensions: 51 x 42 x 13mm (H x W x D)
• Instruction Guide.
• 2 Years Manufacturers Warranty: