Square Nautilus-inspired 5821 Black Sunburst Two-Tone Rose Gold Super Clone

Premium top-tier factory exclusive launch: the all-new 2025 Square Nautilus-inspired 5821 large size model, the bold nautilus-inspired square sports timepiece that features the classic two-tone rose gold design, perfect for users who want a timeless all-occasion watch that fits any scenario. A lot of our clients from North America also refer to this model as Cubitus 5821, we know this is the one you want.

This model is designed specifically for men with bigger wrists who love the classic two-tone style, following the legendary 5711, this is the bold large-size version that delivers a timeless, premium presence on the wrist, ideal for users who prefer a more versatile look than the smaller 40mm version. No more struggling to find a classic all-occasion watch that fits your big wrist, we've got you covered.

Core Craftsmanship Highlights

• Upgraded Stop-seconds Movement: Equipped with the customized 9015 modified Cal.26-330 SC integrated automatic self-winding movement, exactly the same movement used in all our top-tier Square Nautilus-inspired watches. This upgraded movement features stop-seconds function when setting time, the balance wheel position matches the authentic version exactly. It delivers precise sweep seconds, 35-45 hours power reserve, and the exact same visual layout as the official version, no details are missed, perfect for daily wear, you don't have to worry about time accuracy at all, no matter what occasion you are in.
• Premium Two-Tone Bracelet with New Clasp: Equipped with 316L medical-grade custom ergonomic two-tone steel bracelet, paired with the upgraded new fold-over clasp that you won't find in low-quality watch. The rose gold parts are made with premium PVD coating that won't fade or tarnish, and we provide free size adjustment for big wrists — even if you have a 9.5 inch extra large wrist, we can extend the bracelet to fit you perfectly, no extra charge. It provides all-day comfort without any irritation, while the new clasp ensures secure and easy wearing, just like the authentic version.
• Exact Official Size & Weight: With a 45mm case diagonal measurement (from 10 o'clock to 4 o'clock, excluding the crown), the case thickness is only 8.3mm, exactly the same as the official version. Many big wrist users worry that two-tone watches are too heavy or only fit certain occasions, but this ultra-thin case with the classic black dial is extremely light and timeless, you can wear it for work, business meetings, weekend parties, or daily dates without any pressure on your wrist, it brings you the premium rose gold texture without the heavy feeling of full gold watches.

The stunning classic black sunburst dial features a unique horizontally embossed pattern, catching light from every angle to create a deep, elegant visual effect, paired with the two-tone rose gold case and bracelet, it creates a perfect balance between premium texture and timeless style. This is the most timeless two-tone style in the entire 5821 collection, it's the most versatile all-occasion style that can match any outfit perfectly. Many big wrist users who love two-tone style worry that they can't find a large size version that fits all occasions, but this model solves that problem perfectly, it brings you the premium two-tone experience, but in a classic, timeless way that fits your big wrist, you don't have to change your watch for different occasions anymore, this one can do it all. The contrast between the steel and rose gold finishes on the case and bracelet highlights the bold geometry of the large square case with rounded corners, making it perfect for any occasion, whether it's formal business meetings, casual daily wear, weekend parties, or romantic dates.

Our Premium Service Guarantee (Same as our entire collection)

• Video Proof Before Shipping: Just like all our Square Nautilus-inspired watches, we will take exclusive real video for you before shipping, you can check every detail of this classic black two-tone watch before payment, no scam, no fraud, you know exactly what you are getting.
• Discreet Worldwide Delivery: Plain packaging without any logo, customs-friendly shipping, full tracking available, deliver to your door safely.
• 2-Year Full Warranty: We provide 2-year full warranty for all our watches, any movement or craft problem, we will fix it for free, you don't have to worry about the quality.
• Free Bracelet Adjustment for Big Wrists: Exclusive free size adjustment service for big wrist users, we can extend the bracelet to fit up to 9.5 inches wrist perfectly, no extra charge.
• No Reason Return: 7 days no reason return policy, if you are not satisfied with your watch, you can return it for full refund.

If you like this 45mm big wrist basic style, you might also be interested in:

• Our 7128 Regular Wrist Basic Collection, if you have a regular wrist and want a smaller case size
• Our 5822 Big Wrist Annual Calendar Collection, if you want the multi-function annual calendar model for big wrists
• Our 5821 Full Pavé Diamond Collection, if you are looking for the luxury iced out style