Casio announced the MRG-D5000 on October 1, 2026: an MR-G whose bezel and case use blue sapphire crystal components in a screwless multi-part structure. The worldwide limited edition is restricted to 20 pieces. It is not an all-sapphire watch: Casio also specifies titanium components and a Dura Soft rubber strap.
What makes the MRG-D5000 unusual?
Casio describes the construction as its MR-G Multi-Guard Structure. The bezel and case are assembled from multiple components without screws that, Casio says, could crack the sapphire crystal. The company says it analyzed the forces transmitted to sapphire during impact to optimize the structure; that is Casio’s design explanation, not an independent impact-test report. Casio’s G-SHOCK product page says the design draws on kigumi, traditional Japanese timber-frame construction that uses interlocking joints rather than screws or nails.
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Blue sapphire crystal is used for structural components, while the case and bezel materials are listed as titanium and sapphire crystal. The strap is Dura Soft rubber, with a brick pattern and a one-touch three-fold clasp. Casio’s product page also describes a specially developed titanium clasp and a grade-5 titanium alloy case back with an embedded blue sapphire crystal. The sapphire glass has an anti-reflective coating; the titanium portion receives DLC treatment.
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| Specification | Casio listing |
|---|---|
| Case and bezel materials | Titanium and sapphire crystal |
| Strap | Dura Soft rubber |
| Dimensions | 51.1 × 43.2 × 16.5 mm |
| Weight | 121 g |
| Water resistance | 200 meters |
| Power | Gallium Tough Solar |
| Time calibration | Multi Band 6 radio-controlled timekeeping |
| Additional listed functions | World time, stopwatch, timer, alarms, LED backlight and calendar |
These figures and functions come from Casio’s international product specification page. The announcement identifies the model as the first G-SHOCK to achieve a shock-resistant structure using components made with blue sapphire crystal. Casio dates the MR-G collection’s launch to 1996.
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How it differs from Casio’s other sapphire announcements
Casio’s October 1 announcement also names two other watches with blue sapphire details, but they are distinct models with different construction:
| Model | Sapphire use described by Casio | Collection |
|---|---|---|
| MRG-D5000 | Sapphire components in the case and bezel structure | MR-G |
| MRG-B5000SA | Two-carat facet-cut blue sapphire crystals at the top and bottom of the case | MR-G |
| GMW-B5000SB | Sapphire stones at four points on the bezel | Full-metal G-SHOCK |
Casio confirms a 20-piece worldwide edition for the MRG-D5000; the announcement does not establish matching edition sizes or sales terms for the other two models. Details about all three are in Casio’s October 1, 2026 announcement.
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- Smartphone Link Functions; Battery Level Indicator; New Layer Guard Structure; Tough Solar; Dual Dial World Time; Chronograph
- 200 Meter Water Resistance; Shock Resistance; Neobrite; Bluetooth Capability
- Quartz Movement
- Case Diameter: 53.8mm
- Water resistant 200m (660ft): in general, suitable for professional marine activity and serious surface water sports, but not diving
Edition size, price and availability
Casio says the MRG-D5000 will be a limited edition of only 20 pieces worldwide, with an individual serial number on each case back. The reviewed announcement and international specification page do not state a confirmed retail price, regional allocation, launch schedule, or purchase process. Check Casio’s regional site or an authorized retailer for current sales information rather than assuming the watch is generally available.
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Quick Recap
Rank #4
- Tough Solar Power & Multi-Band 6 Atomic Timekeeping: Enjoy precise timekeeping with radio-controlled accuracy across six calibration signals worldwide, powered by Casio's efficient solar technology for continuous operation.
- Durable Stainless Steel Construction: Features a robust stainless steel band with a one-touch 3-fold clasp and a shock-resistant resin/stainless steel case, providing both durability and a sleek, sophisticated look.
- 200-Meter Water Resistance: Built to withstand extreme conditions, this watch is suitable for professional marine activities and serious surface water sports, offering water resistance up to 200 meters (660 feet).
- Versatile Timekeeping Functions: Equipped with world time across 31 time zones (48 cities), a 1/100-second stopwatch, 24-hour countdown timer, and 5 independent daily alarms (including a snooze alarm) to keep you on schedule.
- Electro-Luminescent Backlight with Full Auto EL: The blue-green EL backlight with afterglow ensures optimal readability in low-light conditions, automatically activating in dim environments for your convenience.
Rank #3
- Countdown timer, full auto calendar, 12/24 hour format
- Quartz Movement
- Case Diameter: 51.2mm. Hourly time signal
- Water resistant 200m (660ft): in general, suitable for professional marine activity and serious surface water sports, but not diving
- Shock Resistant; 200M Water Resistant; Auto LED; World Time; 5 Daily Alarms; 1/100th Sec. Stopwatch.
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.
