Casio G-Shock GA-B2100-1A Tough Solar Bluetooth Ana-Digi Black Resin Watch (GA-B2100-1A)
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- Authorised dealer
- Full manufacturer warranty
- Serviced in-house
- Secure checkout
Description
The Casio G-Shock GA-B2100-1A represents the evolution of the iconic "CasiOak" design, combining the rugged octagonal profile with advanced solar charging and Bluetooth smartphone connectivity. This blacked-out timepiece features a 45.4mm carbon-reinforced resin case with shock-resistant construction, making it one of the most durable watches in the G-Shock range. The layered dial displays analogue timekeeping with a digital sub-display at six o'clock, offering both traditional readability and modern functionality in a single glance.
At Cassims & Co., we are proud to be an authorised Casio retailer, ensuring every G-Shock sold comes with full manufacturer warranty and authentic quality assurance. The GA-B2100-1A is powered by Tough Solar technology, harnessing light energy to eliminate battery replacements, while Bluetooth connectivity allows seamless time synchronisation and world time access through the G-Shock Connected app. The watch features a hand shift function that temporarily moves the analogue hands out of the way for clear digital display reading, a thoughtful detail that showcases Casio's engineering excellence.
Built to withstand the harshest conditions, this G-Shock offers 20-bar water resistance (suitable for recreational diving), LED illumination with afterglow, and a stopwatch function measuring down to 1/100th of a second. The all-black resin construction creates a stealthy, tactical aesthetic that transitions effortlessly from the gym to the boardroom. Browse our full range of CASIO watches to explore more G-Shock innovations and classic timepieces.
Whether you're seeking a reliable outdoor companion or a statement piece that embodies modern toughness, the GA-B2100-1A delivers exceptional value at R4,124.00. Visit us at our Mall of the South boutique to experience this watch in person, or take advantage of our nationwide delivery service across South Africa. Our watch servicing and repairs team is always available to assist with battery replacements, bracelet adjustments, and ongoing maintenance to ensure your G-Shock performs flawlessly for years to come.
Specifications
- Reference: GA-B2100-1A
- Movement: Tough Solar (solar-powered quartz)
- Case Material: Carbon-reinforced resin
- Case Diameter: 45.4mm
- Case Thickness: 11.9mm
- Case Length: 48.5mm
- Dial Colour: Black
- Display Type: Analogue-digital combination
- Strap Material: Black resin
- Strap Width: Fits wrists 145mm to 215mm
- Water Resistance: 20 bar (200 metres)
- Functions: Smartphone Link (Bluetooth), world time, stopwatch (1/100 second, 24-hour), countdown timer, 5 daily alarms, hand shift feature, full auto-calendar, 12/24-hour format
- Illumination: LED light with afterglow
- Power Reserve: Solar-powered with battery backup
- Construction: Shock-resistant structure
- Weight: 52 grams
- Crystal: Mineral glass
- Buckle Type: Tang buckle
- Warranty: 1-year international Casio warranty
- GTIN: 4549526322877
FAQ
Q: How does the Tough Solar power system work?
A: The GA-B2100-1A features Tough Solar technology, which converts any light source—natural or artificial—into electrical energy to charge the internal rechargeable battery. Once fully charged, the watch can run for approximately 6 months in total darkness without exposure to light, ensuring you never need a battery replacement.
Q: What features are accessible through the Bluetooth smartphone link?
A: The G-Shock Connected app allows automatic time synchronisation with atomic clock accuracy, access to over 300 world time cities, easy alarm and timer settings, and a phone finder function. The Bluetooth connection is energy-efficient and activates only when needed, preserving solar power.
Q: Is this watch suitable for diving and swimming?
A: Yes, with 20-bar (200-metre) water resistance, the GA-B2100-1A is suitable for recreational scuba diving, snorkelling, swimming, and all water sports. It exceeds ISO 22810:2010 standards for dive watches.
Q: What is the hand shift feature?
A: When you press the digital display button, the analogue hands temporarily move out of the way to provide an unobstructed view of the digital information on the sub-display. The hands automatically return to the correct time position after viewing.
Q: How shock-resistant is this G-Shock model?
A: The GA-B2100-1A features G-Shock's signature shock-resistant construction with a carbon-reinforced case that protects the module from impacts, drops, and vibrations. It's designed to withstand extreme physical stress that would damage conventional watches.
Q: Can I replace the battery myself when it eventually needs replacement?
A: The rechargeable solar battery is designed to last many years (typically 7-10 years) with proper light exposure. When eventual replacement is needed, we recommend using Casio's authorised service network. Cassims & Co. can facilitate this service for you.
Q: What is the difference between the GA-B2100 and the original GA-2100 series?
A: The GA-B2100 adds Bluetooth smartphone connectivity to the popular GA-2100 "CasiOak" design. This allows for automatic time adjustment, world time access, and app-based settings control, while maintaining the same slim 11.9mm profile and octagonal case shape.
Warranty
- This watch is covered by a 1-year international Casio warranty from the date of purchase when bought from an authorised retailer such as Cassims & Co.
- The warranty covers manufacturing defects in materials and workmanship under normal use conditions.
- The warranty does not cover normal wear and tear, including scratches, strap deterioration, or resin discolouration due to age and UV exposure.
- Battery replacement, even for the rechargeable solar battery after its natural lifespan, is not covered under warranty.
- Water damage resulting from misuse, such as operating buttons underwater or failure to properly secure the crown, is excluded from warranty coverage.
- Damage caused by accidents, improper handling, unauthorised repairs, or modifications voids the warranty.
- The warranty is valid only when the watch is purchased from an authorised Casio retailer and requires presentation of the original purchase receipt.
- Warranty service must be performed by Casio's authorised service network; Cassims & Co. can facilitate warranty claims on your behalf.
- The warranty does not extend to consequential damages or losses resulting from watch malfunction.
- For warranty service or technical support, contact Cassims & Co. with your proof of purchase, and we will coordinate with Casio's service centre.
Care guide
- Ensure the watch receives regular exposure to natural or artificial light to maintain solar charge; a fully charged battery can power the watch for approximately 6 months in darkness.
- Although water-resistant to 20 bar, rinse the watch with fresh water after exposure to saltwater or chlorinated pool water, then dry thoroughly with a soft cloth.
- Avoid operating the buttons or crown while the watch is wet or submerged to prevent water ingress into the case.
- Keep the watch away from strong magnetic fields (speakers, magnetic clasps, MRI machines) which may temporarily affect timekeeping accuracy.
- Clean the resin case and strap periodically with a soft, slightly damp cloth; avoid harsh chemicals, solvents, or abrasive cleaners that may damage the resin finish.
- Do not expose the watch to extreme temperatures (below -10°C or above 60°C) for extended periods, as this may affect solar charging efficiency and battery life.
- If condensation appears inside the crystal, have the watch inspected immediately by an authorised service centre, as this indicates a compromised water seal.
- Store the watch in a location where it can receive ambient light when not being worn to maintain optimal solar charge levels.
- Avoid impacts to the crystal or case, and although shock-resistant, the watch is not indestructible; excessive force may still cause damage.
- For Bluetooth connectivity issues, refer to the G-Shock Connected app troubleshooting guide or consult the instruction manual available on Casio's official website.
Why buy from Cassims & Co.?
Authorised. Authentic. Serviced here.
Authorised retailer
Every watch we sell comes from the brand or its official South African distributor, with the manufacturer's warranty registered to you. No grey imports, no parallel stock.
Set up before it leaves
Bracelet sized to your wrist, date and time set, warranty card stamped, in store or before dispatch.
In-house watchmakers
Battery changes, bracelet links, pressure tests and full services at our own Johannesburg service centre, so your warranty service never leaves the city.
Price-beat promise
Find the identical model in stock at a lower listed price from another authorised SA retailer and we'll match it.
Nationwide delivery
Tracked courier anywhere in South Africa, free over R3,000. Or collect at Mall of the South or Greenstone.
Delivery & returns
Tracked courier delivery across South Africa in 1–3 working days; free on orders over R3,000. Collect in store at Mall of the South or Greenstone Shopping Centre at no charge.
See our shipping policy and refund policy for full details.
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