Product Introduction The Black Bay GMT timepiece blends classic vintage diver aesthetics with practical GMT dual-time functionality, a versatile daily sports watch for casual, outdoor and diving scenarios. This upgraded version optimizes case finishing, bracelet structure and internal movement for better wearing experience and stable long-term performance, with rich color matching options for all style preferences. 1. 41mm Polished & Brushed Steel Case 41mm medium-sized stainless steel case built with dual finishing craft: matte brushed main surface paired with hand-polished chamfer edges, smooth curved contour to avoid wrist scratch, retaining iconic tough vintage streamline. The bidirectional rotatable dive bezel is crafted from aerospace-grade anodized aluminum, with clear engraved diving scale, consistent texture and color matching. 2. Domed Vintage Sapphire Crystal Front watch surface adopts domed “bubble” sapphire crystal glass, classic retro curved shape with double-sided anti-reflective coating. High hardness scratch-resistant material effectively prevents daily abrasion, guaranteeing clear dial reading under strong sunlight and dark environments. 3. Upgraded Rivet Stainless Steel Bracelet Fully upgraded solid rivet steel bracelet with micro-adjust safety clasp. Each solid link is connected by signature rivet heads to form a unique stepped structure; all edges and clasp surfaces are finely rounded and polished without sharp corners, lightweight and skin-friendly for all-day wear. The hidden micro-adjust clasp allows fine-tuning bracelet tightness without removing links. 4. Swiss 2836 Self-Winding Mechanical Movement Equipped with premium Swiss 2836 automatic movement, stable timekeeping performance with dual time GMT function, date display and luminous hour/minute hands for night reading. Automatic winding via daily wrist movement, long power reserve, smooth and responsive function adjustment without jamming. 5. Professional Diving Performance 200 meters water resistance, fully compliant with daily swimming, snorkeling and outdoor water activities. Screw-down crown locks tightly to prevent water infiltration, sealed dial structure protects internal movement from moisture and dust erosion. 6. Multiple Color Options Available in Blue Bezel, Red Bezel, Green Bezel, Black Gold Bezel, Solid Black Bezel series, matching black/blue sunburst dial to meet different collocation demands. Specifications • Series: Black Bay GMT Diver Watch • Case Diameter: 41mm • Case Material: 316L Stainless Steel • Bezel: Anodized Aluminum Rotatable Dive Bezel • Crystal: Domed Double Anti-reflective Sapphire Glass • Movement: Swiss 2836 Automatic Mechanical Movement • Functions: GMT Dual Time, Date Display, Luminous Hands, 200m Water Resistance • Strap: Solid Rivet Stainless Steel Bracelet with Micro-adjust Clasp • Available Colors: Blue, Red, Green, Black-Gold, Solid Black Bezel Shipping & Customer Service Global tracked shipping for all orders, tracking number will be sent after dispatch. If you need full color catalog, close-up macro photos or movement operation videos, contact our WhatsApp support for more details.
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Compare before you choose
“12A” and “7A” are this store’s internal configuration labels, not independent industry standards. Exact parts and test results must be confirmed on the individual QC record.
| Compare | Original retail reference | 12A Premium Build Most detailed | 7A Standard Build |
|---|---|---|---|
| Price | Verify with the brand or an authorised retailer | $810Confirm availability before payment | $485Current store price |
| Movement | Brand calibre; verify by reference | Automatic mechanical, selected finish | Reliable automatic movement; exact calibre confirmed before order |
| Materials | Verify on official model specification | Steel | 316L steel or listed material |
| Crystal | Verify on official model specification | Sapphire where listed | Mineral or sapphire; confirm by model |
| Accuracy | Brand specification | Measured during QC; result supplied for the individual watch | Measured during individual QC |
| Water resistance | Official rating, subject to service condition | Splash resistant only unless the individual QC report states otherwise | Splash resistant unless separately tested |
| QC evidence | Authorised retailer documentation | Photos, video and timing result | Photos and functional check |
Specifications
The details that matter
- Reference / SKU
- dlz1787465357154
- Case dimensions
- Confirm before order
- Movement
- Automatic mechanical
- Materials
- Steel
- Water use
- Splash resistant only unless the individual QC report states otherwise
- Package
- Protective travel packaging; presentation box only when listed
Movement information
See what powers the watch
Listed movement: Automatic mechanical.
Before shipping, ask for a clear caseback photo, a short running video and the timing-machine result. Decoration, rotor shape and bridge layout can vary by batch, so the QC image of the individual watch is the controlling reference.
- Movement and function check
- Time/date/chronograph test where applicable
- Timing rate and amplitude photo when available
- Rotor noise and winding feel checked
QC information
Approve the actual watch before dispatch
Your order enters a private QC record after availability is confirmed. The record should show the exact item, not catalogue imagery.
- 01
Order matched
Reference, colour, size and configuration are checked.
- 02
Visual inspection
Dial, hands, case, bracelet, clasp and markings are photographed.
- 03
Functional test
Movement, crown, date and model-specific functions are tested.
- 04
Your approval
QC photos/video are sent for approval before packing and tracking.
Packaging & shipping
A visible order timeline
QC in 2–4 business days; delivery commonly 7–14 business days after approval. Customs processing and remote destinations can add time. A presentation box changes parcel size and may ship separately; it is included only when the product page or QC record says so.
FAQ & verification
Questions to ask before paying
Is this sold as an authentic brand-manufactured watch?
No unless the listing explicitly provides verifiable provenance and authorised documentation. Store grade labels describe configurations; they are not authentication certificates.
How can I verify what I will receive?
Match the QC photos to the order reference. Request a dated video showing the dial, caseback, clasp, serial/marking areas, movement where accessible, and every function. Save the approved QC record.
Can a photo prove authenticity?
No. Photos can help confirm appearance and the shipped item, but authentication requires provenance and qualified physical inspection. Never rely on a logo, serial number or packaging alone.
What should I check in the timing result?
Confirm that the displayed watch is running, then review rate, amplitude and beat error. Results are a snapshot, not a lifetime guarantee, and can change with position, temperature and transport.
Is the watch safe for swimming?
Only if the individual watch has passed an appropriate pressure test and the result is documented. Otherwise treat it as splash resistant and keep it away from showers, pools and seawater.
When will the order ship?
QC in 2–4 business days; delivery commonly 7–14 business days after approval. Tracking is issued after QC approval and dispatch.
Purchase clarity
Nothing important should be assumed.
Confirm the configuration, exact price, included items, QC evidence, delivery estimate and after-sales terms in writing before payment.
Confirm this model
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