Casio G-Shock Original GA-100 -1A4ER 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's dial features a fifth grade on the Mohs hardness scale.

The use of the G-Shock system increases the watch's resistance to shock and mechanical damage. The model is characterized by high water resistance and is resistant to submersion up to 200 meters (20 bar), which allows safe use while swimming and even diving. The system also provides protection against the effects of magnetic fields (ISO Standard 764).

The daily time is displayed in 12/24 hour format. In addition, the watch is equipped with: 5 daily alarms with a snooze function, an expanded perpetual calendar, a stopwatch with a measurement length of up to 100 h and an accuracy of 1/1000 s, and a countdown timer for up to 24 h. The world time function allows you to read the time in different time zones. The watch is equipped with a measurement of the average speed on the route traveled.

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.

Technical data
Model: GA-100-1A4ER
Material: quartz, plastic
Mechanism: quartz Miyota
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 CR1220 battery
Weight: 70 g
Manufacturer: Casio, Japan