Casio G-Shock Original GA-100-1A2ER watch

Waterproof and shockproof sports watch with quartz movement. The 35mm-diameter analog-digital dial is equipped with auto-LED backlighting. The backlighting function can be activated manually or by raising the hand with the watch and zooming in towards the face. The mineral glass used to shield the watch face features fifth grade on the Mohs hardness scale.
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The use of the G-Shock system increases the watch's resistance to shock and mechanical damage. The model features high water resistance and is resistant to dives up to 200 meters (20 bar), which allows for safe use while swimming and even diving.


Daily time is displayed in12/24-hour format. In addition, the watch is equipped with: 5 daily alarms with snooze function, an extensive perpetual calendar, stopwatch with a measurement length of up to 100 h and an accuracy of 1/1000 s, and a timer counting down to 24 h. The world time function allows you to read the time in different time zones.


The model is powered by a CR1220 battery, the manufacturer specifies a battery life of 2 years. The watch comes with a flexible strap made of plastic in black. The circumference of the strap is adjustable with a metal buckle.

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Technical data
. Model: GA-100-1A2ER
. Material: quartz, plastic
Mechanism: Miyota quartz
. Water-resistance: 20 atm (200 m)
Time display: analog-digital
. Envelope width: 50 mm
Thickness of the envelope: 17 mm
Dial diameter: 35 mm
Maximum strap circumference: 220 mm
Power supply: 1 x battery CR1220
Weight: 70 g
Manufacturer: Casio, Japan