Casio G-Shock GM-B2100D-1ADR Tough Solar Bluetooth Full-Metal Stainless Steel Watch (GM-B2100D-1A)
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- Authorised dealer
- Full manufacturer warranty
- Serviced in-house
- Secure checkout
Description
The Casio G-Shock GM-B2100D-1ADR represents the ultimate evolution of the iconic 'CasiOak' design, combining the legendary shock resistance of G-Shock with the refined aesthetic of a full-metal construction. This timepiece reimagines the octagonal form inherited from the DW-5000C — the very first G-Shock from 1983 — in a contemporary full stainless steel case and bracelet that balances rugged durability with sophisticated style. The black multilayer dial features analogue and digital displays, offering exceptional legibility and functionality for the modern wearer who demands both precision and presence.
Powered by Casio's Tough Solar technology, this watch harnesses light energy to maintain continuous operation without the need for battery replacements, while Multi-Band 6 radio-controlled timekeeping ensures accuracy across six calibration signals worldwide. Bluetooth connectivity via the G-Shock Connected app provides seamless smartphone link functionality, automatic time adjustment, and access to over 300 world cities. The 200-metre water resistance and shock-resistant construction uphold G-Shock's legendary toughness, making this an instrument designed to withstand the demands of daily life whilst maintaining impeccable timekeeping.
At Cassims & Co., we are proud to be an authorised retailer for CASIO watches, ensuring that every G-Shock GM-B2100D-1ADR comes with full manufacturer warranty and after-sales support. Whether you're drawn to the technical capabilities of Tough Solar charging, the precision of radio-controlled timekeeping, or the distinctive full-metal aesthetic that elevates the CasiOak lineage, this timepiece delivers uncompromising performance. Our expert team at our Mall of the South boutique can guide you through the watch's extensive feature set and ensure the perfect fit on your wrist, while our watch servicing and repairs team stands ready to provide ongoing care for your investment.
Specifications
- Reference Number: GM-B2100D-1ADR / GM-B2100D-1A
- Brand: Casio G-Shock
- Movement: Tough Solar (solar-powered quartz)
- Case Material: Stainless steel
- Case Diameter: 44.4 mm
- Case Thickness: 12.8 mm
- Case Length: 49.8 mm
- Weight: 165 g
- Dial Colour: Black (multilayer)
- Display Type: Analogue-digital combination
- Bracelet Material: Stainless steel
- Water Resistance: 200 metres (20 bar)
- Shock Resistance: Yes (G-Shock construction)
- Power Reserve: Solar-powered (charges in light)
- Functions: Multi-Band 6 radio-controlled timekeeping, Bluetooth smartphone link, world time (300+ cities), stopwatch, countdown timer, alarm, LED backlight, power saving function, automatic calendar
- GTIN/Barcode: 4549526327315
- Crystal: Mineral glass
- Case Shape: Octagonal
FAQ
Q: What is Tough Solar and how does it work?
A: Tough Solar is Casio's proprietary solar-charging technology that converts any light source — sunlight, fluorescent, LED — into electrical energy to power the watch. Once fully charged, the watch can run for months even in complete darkness thanks to its power-saving mode. This eliminates the need for regular battery replacements and ensures reliable, environmentally friendly operation.
Q: How does the Multi-Band 6 radio-controlled timekeeping function?
A: Multi-Band 6 automatically receives time calibration signals from six transmission stations worldwide (Japan ×2, North America, UK, Germany, China), ensuring the watch displays the correct time with atomic clock precision. The watch automatically adjusts for daylight saving time and ensures accuracy to within one second.
Q: What features are accessible through Bluetooth smartphone connectivity?
A: By pairing with the G-Shock Connected app on your smartphone, you gain access to automatic time synchronisation, easy adjustment of world time and alarm settings, a time and place log, and the ability to set over 300 world cities. The connection also enables a phone finder function and provides battery level indication.
Q: Is this watch suitable for swimming and diving?
A: Yes, with 200-metre water resistance, the GM-B2100D-1ADR is suitable for recreational diving, swimming, snorkelling, and water sports. The screw-lock crown and robust construction ensure water integrity even under pressure. However, it is not designed for professional saturation diving.
Q: What is the difference between this model and the resin G-Shock 2100 series?
A: The GM-B2100D-1ADR features a full stainless steel case and bracelet construction, offering a more refined and substantial aesthetic compared to the resin GA-2100 models. The metal construction increases weight to 165g and provides enhanced durability and scratch resistance, while maintaining the same shock-resistant core structure and Tough Solar functionality.
Q: Can the stainless steel bracelet be adjusted to fit my wrist?
A: Yes, the stainless steel bracelet features removable links that can be adjusted to fit your wrist perfectly. Our team at Cassims & Co. offers complimentary bracelet sizing at the time of purchase to ensure optimal comfort and fit.
Q: How long does a full solar charge last?
A: Once fully charged through exposure to light, the watch can operate for approximately 7 months in complete darkness when power-saving mode is activated. Regular exposure to indoor or outdoor light during daily wear ensures the watch remains continuously charged without intervention.
Warranty
- Warranty Period: This Casio G-Shock GM-B2100D-1ADR is covered by a 1-year international Casio manufacturer warranty from the date of purchase.
- Warranty Coverage: The warranty covers defects in materials and workmanship under normal use conditions. This includes manufacturing faults in the movement, case, bracelet, and solar charging system.
- Warranty Exclusions: The warranty does not cover normal wear and tear, scratches or cosmetic damage to the case, bracelet, or crystal, water damage resulting from improper use or failure to ensure crown security, damage from accidents, impacts, or misuse, unauthorised modifications or repairs, or damage from extreme conditions beyond the watch's specifications.
- Authorised Retailer Requirement: This warranty is valid only when the watch is purchased from an authorised Casio retailer such as Cassims & Co. Proof of purchase is required for all warranty claims.
- Solar Battery: The rechargeable solar battery is covered under warranty for manufacturing defects but is subject to natural capacity degradation over time, which is considered normal wear.
- Warranty Service: Warranty service must be performed by authorised Casio service centres. Retain your original purchase receipt as proof of purchase date and authorised retailer status.
- After-Sales Support: As an authorised Casio retailer, Cassims & Co. provides ongoing support for bracelet adjustments, guidance on watch functions, and assistance with warranty claims throughout the warranty period.
Care guide
- Regular Cleaning: Wipe the stainless steel case and bracelet regularly with a soft, lint-free cloth to remove fingerprints, perspiration, and dirt. For deeper cleaning, use lukewarm water with mild soap and a soft brush, then dry thoroughly.
- Solar Charging: Expose the watch dial to light regularly to maintain optimal solar charge. Avoid storing the watch in complete darkness for extended periods. Indoor fluorescent lighting is sufficient to maintain charge during daily wear.
- Water Resistance Maintenance: Rinse the watch with fresh water after exposure to saltwater or chlorinated water. Ensure the crown is fully pushed in before water exposure. Have water resistance tested annually if the watch is used frequently for water activities.
- Bracelet Care: Clean between bracelet links periodically using a soft brush to remove accumulated dirt and perspiration. Dry the bracelet thoroughly after water exposure to prevent moisture retention.
- Avoid Extreme Conditions: While G-Shock watches are designed for durability, avoid exposing the watch to extreme temperatures (below -10°C or above 60°C), strong magnetic fields, or harsh chemicals including solvents and cleaning agents.
- Impact Protection: Although shock-resistant, avoid deliberate impacts or dropping the watch onto hard surfaces, as extreme force may affect timekeeping accuracy or damage internal components.
- Button Operation: Press buttons firmly but gently. Avoid operating buttons while underwater or when the watch is wet, as this may compromise water resistance.
- Storage: When not wearing the watch for extended periods, store it in a cool, dry place away from direct sunlight. Ensure the watch receives occasional light exposure to maintain solar charge.
- Professional Servicing: Have the watch inspected by an authorised Casio service centre every 2-3 years to ensure gaskets, water resistance, and overall functionality remain optimal.
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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