On this Harry Winston Ocean 400/MATTZ45W, the case is White gold, the dial is Grey and the bracelet is Leather. The case measures 45 mm across. The bezel is made of White gold.
The dial numerals are listed as "Arabic numerals". The dial is protected by Sapphire crystal. The watch is powered by the Automatic movement. The power reserve is 42 h.
The bracelet comes in Black. It is secured by the Fold clasp. The clasp is made of White Gold. The watch dates from Unknown.
The reference number 400/MATTZ45W separates this version from other variants of the model, down to dial, bezel and bracelet details, so match it against the photos before you buy.
Every watch sold by WATCHOYSTER is inspected and authenticated by our certified watchmaker and verified against The Watch Register before it reaches you. Each piece comes with our warranty and a 14-day return policy. Interested in the Harry Winston Ocean 400/MATTZ45W? Write to us on WhatsApp, and we will send additional photos and delivery details.
For maximum security and transparency, a Watch Certificate™ can be provided upon request. This independent document confirms the authenticity of the timepiece and protects you from counterfeit or altered watches.
We cooperate with the global organization The Watch Register®. Upon request, every watch - whether new or pre-owned — can be supplied with an official certificate from this international authority.
All orders are shipped with full insurance, ensuring that both domestic and international shipments are safe and worry-free.
You may return the watch within 14 days if it differs from the description or photos, or if there is a defect not mentioned.
All our timepieces are thoroughly inspected by our certified watchmaker to ensure authenticity and perfect working condition. Every watch we offer is guaranteed to be 100% original.
When preferred, collect your watch from our private showroom in Geneva. A secure and discreet handover, designed for your comfort and peace of mind.
Contact us Inform us about the return by writing via WhatsApp — it’s the fastest and easiest way.
Secure return We will provide you with an insured shipping label so you can safely return your watch.
Once your returned watch has been received and inspected, approved refunds are processed within 7–10 business days, using the original payment method whenever possible.
Key details about authentication, financing, viewing, delivery, and condition.
Yes. Before shipment, our certified watchmaker thoroughly inspects this Harry Winston Ocean (Ref. 400/MATTZ45W). The inspection covers movement accuracy, the integrity of its White gold case (45 mm), the condition of its Grey dial, and overall authenticity. The serial number is also checked against The Watch Register.
This timepiece comes with 24 months of WATCHOYSTER Official Brand Service Coverage, with eligible repairs carried out at authorised brand service centres at our expense. Our 14-day return policy also applies if the watch does not match its description or photographs.
Flexible financing is available for selected watches to eligible customers residing in Switzerland. Currently, financing is offered for watches priced up to CHF 10,000.
Eligible models are clearly marked with a financing badge on the product page.
Interest rates, repayment periods and approval conditions depend on the financing provider. Full details are presented during the application process at checkout.
WATCHOYSTER is a professional luxury watch dealer based in Geneva, Switzerland. Due to our secure storage and logistics arrangements, we do not offer in-person viewings before purchase.
However, we are happy to provide additional photographs, detailed videos, and personal assistance to help you make a confident decision.
Clients are welcome to collect their watches in person at our Geneva office by appointment after purchase.
This Harry Winston Ocean 400/MATTZ45W is carefully inspected and verified before shipment, then dispatched fully insured from our Geneva facility. Delivery typically takes 4–7 business days, depending on the watch and destination. Estimated delivery dates specific to this timepiece are clearly displayed on its product page. Tracking information is provided once the watch has been dispatched. Included with this timepiece: Original box, original papers.
This Harry Winston Ocean is listed in Used (Very good) condition. Before shipment, our certified watchmaker carefully inspects the case, dial, bezel, crystal, and bracelet to verify its condition and ensure it matches the description. Real photographs on this page show the actual watch. Included with this timepiece: Original box, original papers. A WatchCertificate digital passport is available on request, providing independent documentation of the watch’s authenticity, condition, and available service history.
Real impressions from clients who worked with our team and received their watches.