The Casio G-Shock MRG-B5000B-1DR takes the familiar square G-SHOCK shape and gives it a premium, mostly titanium construction, black DLC finish and metal bracelet. It is not all titanium: its bezel top is cobalt-chromium alloy, and Casio specifies multiple titanium alloys across the case, bezel and band. Its 49.4 × 43.2 × 12.9 mm dimensions, 114 g weight and feature set make it a substantial, specification-rich alternative to a resin square—not simply the same watch with a metal strap.
What is the MRG-B5000B-1DR?
It is Casio’s black MR-G interpretation of the original square G-SHOCK design. The brick-pattern dial and red line are references to the original square, while the metal case and bracelet, layered bezel and black finish distinguish this version from resin-strap squares. Casio says MR-G watches are made on the Premium Production Line at Yamagata Casio; that is a manufacturer statement, not an independent assessment of quality.
The UK product page uses the full MRG-B5000B-1DR name. Regional pages may omit the “DR” suffix. The black B model should also not be confused with the metallic-finish MRG-B5000D or the blue-accented MRG-B5000BA.
What is the MRG-B5000B made of?
“Titanium” is a useful shorthand, but not a complete materials description. Casio specifies a Ti64-based titanium alloy case and bezel, a DAT55G titanium-alloy band, and a COBARION cobalt-chromium-alloy top bezel. The B model’s black exterior uses a diamond-like carbon (DLC) coating. Casio contrasts that finish with the metallic titanium-carbide finish on the MRG-B5000D. The watch also has sapphire crystal with an anti-reflective coating.
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Casio describes the bezel as 25 separately polished components and says its Multi-Guard Structure uses a multi-part construction. The company’s launch announcement says COBARION is four times harder than pure titanium and DAT55G is three times harder than pure titanium. Those are Casio-published material claims, not independent scratch-test results; they do not establish that the finished watch is scratch-proof.
How big and heavy is it?
Casio UK lists dimensions of 49.4 × 43.2 × 12.9 mm and a weight of 114 g. The watch has a solid titanium band and a tight-lock, one-press, three-fold clasp. Those figures can help you judge whether the square’s footprint and metal-bracelet weight suit your preferences, but they cannot predict how it will sit on a particular wrist. Trying it on is the best way to assess fit.
Rank #2
- PREMIUM CONSTRUCTION: Full-metal titanium case and band with DLC coating and deep-layer hardening, featuring over 70 meticulously crafted exterior components for ultimate durability
- DIVING CAPABILITIES: ISO 200-meter water resistance with screw-lock case back, one-touch adjustable band to fit over wetsuits, and specialized diving mode display
- SMART FEATURES: Bluetooth connectivity for smartphone pairing, allowing access to tide data for 3000+ locations and detailed dive log tracking through dedicated app
- ADVANCED TIMEKEEPING: Multi-band 6 radio control and Tough Solar power system ensure accurate, maintenance-free operation with automatic time adjustment
- SPECIFICATIONS: Case dimensions 56 × 49.7 × 18.6mm, weighs 170g, shock-resistant and magnetic-resistant construction with sapphire crystal protection
Features and timekeeping
The specification combines the familiar G-SHOCK durability features with several ways to keep time set:
- Shock resistance and 200-metre water resistance, as specified by Casio.
- Tough Solar charging, with Casio’s approximate rechargeable-battery operation figures of 10 months after a full charge with no further light exposure under normal use, or 22 months in darkness with power saving enabled. These are manufacturer estimates, not independently measured results.
- Multi Band 6 radio time calibration and Bluetooth Mobile Link through the CASIO WATCHES app.
- Sapphire crystal with anti-reflective coating, plus a screw-lock back.
- World time, stopwatch, countdown timer, five daily alarms, LED illumination, full auto-calendar and power saving.
Radio calibration and Bluetooth are distinct features: the watch can receive time-calibration signals, and it can also connect to a phone through the app. The exact availability and usefulness of radio reception depend on the region and whether a supported signal can be received; Bluetooth pairing requires a compatible phone and app.
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- Case size (L× W× H): 49.3 × 43.6 × 13 mm
- Customizable four display modes
How does it differ from a standard G-SHOCK square?
The main difference is not the square outline but the materials and execution. A typical resin square is lighter and uses a strap; the MRG-B5000B-1DR uses a multi-material metal case and bracelet, a layered bezel and DLC-coated black surfaces. It also includes solar charging, radio calibration and Bluetooth Mobile Link. For a meaningful comparison with another square, check its actual material, dimensions, weight, time-setting features, water-resistance rating and local price rather than assuming all squares share the same specification.
Is the Casio MRG-B5000B worth it?
It is most compelling for someone who specifically wants the original square design in a finely finished metal bracelet watch, with solar charging and both radio and Bluetooth time-setting functions. Its appeal is less clear if you mainly want a light, inexpensive everyday G-SHOCK: this is a 114 g metal watch, and its premium construction is central to what you are paying for. The specifications establish what Casio builds into it, but they cannot establish personal comfort, long-term durability or scratch performance.
Rank #4
- Enhance your style with some seriously sophisticated timekeeping from the 5000 line
- Directly descended from the first-ever G-SHOCK , the GMW-BZ5000 carries on the evolution of function and material in a transformative, unprecedented design
- They kept the iconic form of the original G-SHOCK, while developing a new structure that extends the case all the way to the lugs to even further mitigate shock transmission
Casio India lists the MRG-B5000B-1 at ₹350,000 including taxes, with a two-year warranty. This is an India-specific listing, not a global price or warranty; confirm the current price, model suffix, availability and warranty with the relevant regional Casio page or authorized seller before buying.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.Source and model details
Casio’s UK MRG-B5000B-1DR product page provides the listed specifications, functions and construction details. The Casio India product page gives the regional MRP and warranty. Casio’s 2022 launch announcement describes the MR-G construction, materials and production line.
Quick Recap
Best Value
- Metal-clad daring meets sophisticated gleam in this Casio G-Shock that delivers Smartphone Link via Bluetooth(R) and Tough Solar charging system, all in a meticulously finished metal design with iconic octagonal bezel
- This model features a blue metallic vapor deposition dial that is complemented by a black band made of environmentally responsible bio-based resin
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.
