Casio G-Shock GA-100-1A1ER Men's Watch • Extreme Shock Resistance • 20 Bar Water Resistant

The Casio G-Shock GA-100-1A1ER is a men's watch designed for maximum durability and absolute reliability. Its legendary, extremely shock-resistant construction protects the precise quartz movement from impacts and vibrations, while the impressive 20-bar water resistance makes it the perfect companion for any adventure, whether on land or in water.

This wristwatch combines a robust design with intelligent functions. The black resin case and strap emphasize the tough character of the watch while ensuring high wearing comfort. Whether in everyday life or under extreme conditions, this G-Shock can always be relied upon.

Special Features of the Casio GA-100-1A1ER Watch

• Extreme Shock Resistance: A special construction reliably protects the watch from impact and shocks.
• Water Resistant to 20 Bar: The watch is tested according to ISO 22810 and is perfectly suited for free diving without equipment.
• World Time Function: Displays the time in up to 29 different time zones, ideal for travelers.

Care Instructions for Wristwatches

Care & Cleaning

• Daily: Wipe case and bracelet with a soft, dry cloth to remove dirt and perspiration.
• Water-resistant watches: Clean with mild soapy water and a soft brush, rinse, dry thoroughly.
  Important: Screw down the crown firmly beforehand!!!
• Not water-resistant: Clean only dry or slightly damp, do not use water or cleaning agents.
• Avoid: Aggressive agents, perfume, cosmetics, and heat.
• Leather straps: Do not soak, clean only slightly damp, and dry away from heat.
• Water resistance: Do not wear when showering or bathing, have it checked annually.
• Battery (quartz): Have a dead battery replaced immediately.
• Mechanical watches: Service by a master watchmaker every 5 years.

Storage & Handling

• Store watches separately, not directly with other jewelry (risk of scratches).
• When winding mechanical watches, take them off; do not leave the crown pulled out.

Jewelry Care – How to keep your jewelry beautiful:

• Remove jewelry before showering, bathing, and sports.
• Avoid direct sunlight – wood, leather & co. can fade.
• Hands off – constant touching leaves grease and dirt.
• No aggressive cleaning agents such as chlorine, salt water, or disinfectants.
• Apply cosmetics and perfume first, then put on jewelry.