Skip to product information
Hublot Shaped Square Bang Unico All Black 42 mm 821.CX.0140.RX - BRAND NEW

Hublot Shaped Square Bang Unico All Black 42 mm 821.CX.0140.RX - BRAND NEW Hublot Shaped Square Bang Unico All Black…

Reference 821.CX.0140.RX

Full watch configuration

Hublot Shaped Square Bang Unico All Black 42 mm 821.CX.0140.RX - BRAND NEW

$20,399.00
Requested condition
Brand New

By Hublot

Sourced to order. We confirm the watch, condition and final price before purchase. Reference images shown.

Eligible watches: 90-day returns for store credit only. Brand-new watches and other exclusions are final sale. Return terms.

Hublot Shaped Square Bang Unico All Black 42 mm 821.CX.0140.RX - BRAND NEW

Hublot Shaped Square Bang Unico All Black 42 mm 821.CX.0140.RX - BRAND NEW

Current Catalogue Asking Price:

Your Offer

$

Submit your offer for review. Availability and the final price require confirmation.

Preferred Contact Method
I have a trade-in / add a note

Reserve with $200

Hublot Shaped Square Bang Unico All Black 42 mm 821.CX.0140.RX - BRAND NEW

Catalogue watch price: $20,399.00 USD

Your $200 deposit is applied to the watch’s purchase price. It is refundable only if Bizak & Co. cannot fulfill your order.

Estimated remaining balance: $. Pay by bank wire or cryptocurrency after we confirm your watch and final invoice. Shipping and applicable taxes are additional.

Shipping details · Return terms

Watch shipping is paid with the final balance: $100 for U.S. overnight delivery or $500 internationally. Applicable taxes and import charges are additional.

After payment, our team starts the tailored search and contacts you to confirm the specific watch and final invoice. A deposit does not guarantee a unit, the listed price or a delivery date.

Need installments? Check eligibility before paying a deposit.

Speak with a Bizak & Co. specialist about this piece

|Call or Text

The Hublot Square Bang Unico All Black 821.CX.0140.RX is a brand-new 42mm ceramic-cased chronograph presenting an uncompromising all-black aesthetic with a black index dial, ceramic bezel, and black rubber strap. Every surface — from case to crown — is rendered in matching ceramic black, making this one of the most visually cohesive and striking executions in the Big Bang Unico family.

What sets reference 821.CX.0140.RX apart is the architectural squared case silhouette combined with Hublot's signature ceramic expertise, delivering exceptional scratch resistance alongside a commanding wrist presence. If you are looking to buy this Hublot Square Bang Unico All Black online, contact Bizak & Co. today for best-price availability and white-glove service.

Compare it across every Big Bang Unico reference we carry, or browse the full Hublot collection at Bizak & Co.

Buy this Big Bang Unico, trade in your current watch, or sell us yours. Contact Bizak & Co. to make an offer or request a fair-market valuation.

Not the exact one you’re looking for?

Source your dream watch

Learn More

The Hublot Square Bang Unico All Black 42mm — reference 821.CX.0140.RX — is one of the boldest statements in contemporary Swiss watchmaking, marrying a resolutely geometric case architecture with Hublot's mastery of high-tech ceramic. Introduced as an evolution of the iconic Big Bang round family, the Square Bang Unico translates the Unico platform's DNA into a tonneau-square silhouette that commands attention on the wrist without ever losing the sporting versatility that defines the Big Bang lineage.

The 42mm ceramic case of reference 821.CX.0140.RX is executed entirely in Hublot's proprietary black ceramic, a material prized for its extraordinary hardness, near-total scratch resistance, and remarkably lightweight feel against the skin. The ceramic bezel echoes the case's monolithic finish, and the integrated black rubber strap completes a head-to-toe blacked-out presentation that photographers, collectors, and style-conscious enthusiasts find endlessly photogenic. There are no contrasting metals, no visible hardware — just an unbroken field of deep matte-to-satin black.

The black index dial continues the all-black narrative with recessed subdials and applied hour markers that reveal their dimensionality only as light rakes across the surface. The squared case shape frames the dial in a way that feels both architectural and purposeful, channeling a high-design sensibility more often associated with avant-garde fashion than traditional horology, yet the execution is unmistakably Swiss in its precision and finishing quality.

Powering the Square Bang Unico is an automatic chronograph movement — the Unico caliber — developed and manufactured in-house by Hublot, a significant achievement for a brand that has invested heavily in vertical integration. The Unico movement is visible through the exhibition caseback, allowing the wearer to observe the column-wheel and lateral clutch chronograph architecture that enthusiasts admire. This in-house movement credential elevates the 821.CX.0140.RX well beyond fashion-watch territory and into serious collector consideration.

On the wrist, the 42mm footprint strikes a versatile balance — substantial enough to make a statement beneath a shirt cuff or beside a tailored jacket, yet compact enough to avoid feeling overwrought on a range of wrist sizes. The squared lugs and integrated strap create a unified, almost monolithic silhouette that photographs and wears with equal authority. Whether paired with streetwear, a business-casual ensemble, or eveningwear, this watch adapts with rare ease.

Bizak & Co. is pleased to offer reference 821.CX.0140.RX brand new, sourced through authorized channels to ensure complete authenticity and manufacturer warranty eligibility. When you buy the Hublot Square Bang Unico All Black 821.CX.0140.RX from Bizak & Co. at bizakandco.com, you benefit from expert guidance, competitive pricing, and the confidence of dealing with a trusted luxury watch specialist. Contact our team today to confirm availability or to arrange a purchase.

Technical Details
Reference
821.CX.0140.RX
Model
Big Bang Unico
Movement
Automatic
Case material
Ceramic
Bracelet material
Rubber
Dial
Black index
Case size
42mm
Requested condition
Brand New
FAQ

1. What makes the Hublot Square Bang Unico All Black 821.CX.0140.RX special?
Reference 821.CX.0140.RX stands out through its uncompromising all-black presentation — ceramic case, ceramic bezel, black index dial, and black rubber strap — combined with a distinctive squared-case silhouette unique to the Square Bang Unico line. The use of high-tech ceramic throughout gives it exceptional scratch resistance and a lightweight feel that sets it apart from steel or titanium alternatives.

2. What movement powers the Hublot Square Bang Unico 821.CX.0140.RX?
The Square Bang Unico 821.CX.0140.RX is powered by Hublot's in-house Unico automatic chronograph movement, featuring a column-wheel and lateral clutch mechanism visible through the exhibition caseback. The Unico caliber is a fully manufacture movement, developed and produced by Hublot, lending the watch genuine horological credibility alongside its design impact.

3. What is the case size of the Hublot Square Bang Unico All Black?
The Hublot Square Bang Unico All Black 821.CX.0140.RX features a 42mm ceramic case, a size that sits comfortably on a wide range of wrist sizes while still delivering a bold, modern presence. The squared silhouette means it wears with a slightly different visual footprint than a 42mm round case, lending it an architectural, design-forward character.

4. Is the Hublot Square Bang Unico All Black suitable for everyday wear?
Yes — the all-ceramic construction of the 821.CX.0140.RX makes it highly practical for daily use, as ceramic resists scratches, fading, and most chemicals far better than polished steel. The black rubber strap is comfortable and durable, and the overall build quality reflects Hublot's Swiss manufacture standards, making this an ideal everyday luxury sports watch.

5. What is the dial and case material of the 821.CX.0140.RX?
The dial features black indexes on a black background, maintaining the all-black theme that defines this reference, while subdials and markers reveal subtle dimensionality under directional light. The case is crafted from Hublot's proprietary black ceramic, a high-tech material that is lighter than steel, extremely hard, and virtually impervious to everyday scratching.

6. How can I buy the Hublot Square Bang Unico All Black 821.CX.0140.RX from Bizak & Co.?
You can purchase the brand-new Hublot Square Bang Unico All Black 821.CX.0140.RX directly through bizakandco.com or by contacting the Bizak & Co. team for personalized assistance and best-price confirmation. All watches sold by Bizak & Co. are sourced to ensure authenticity, and our specialists are on hand to answer any questions and guide you through a smooth, secure transaction.

Certified Authenticity

Every watch is authenticated before delivery.

Real Family Business

You're buying from genuine people, 30 years in business.

Bizak & Co. Warranty

Every watch is checked by us before shipping.

5 Years Warranty

Our five-year Bizak & Co. warranty covers manufacturing defects affecting mechanical operation under normal use, starting on delivery. It is separate from any remaining manufacturer warranty.

Exclusions include accidental damage, misuse, water damage, cosmetic damage, normal wear, loss and theft. Coverage and service availability for vintage or modified watches are confirmed in writing before purchase.

Read the full warranty terms and service instructions. 

90-Day Returns for Store Credit

Eligible watches may be returned within 90 days for store credit. Brand-new watches and other exclusions are final sale.

Read eligibility, condition requirements, and exclusions.

Insured delivery

Insured shipping

U.S. overnight shipping is $100; international shipping is $500. Dispatch takes 2–3 business days after your wire clears. International transit times vary. Shipping details.

You might also like...

Customer Reviews

Read our reviews on Trustpilot

  • Great family business

    Great family business. They went out of their way to make my purchase go smoothly, they definitely earned my watch business!

    Paul

    Read on Trustpilot ↗
  • Good seller

    Good seller. Honest family

    Mateusz

    Read on Trustpilot ↗
  • Honest family company

    Honest family company. I’ve done business many times!

    Mollie

    Read on Trustpilot ↗
  • Trusted Seller

    Trusted Seller, Definitely recommend for all watches purchase!

    Consumer

    Read on Trustpilot ↗
  • Trusted and honest seller

    Trusted and honest seller. Deal with confidence.

    Jean Dib

    Read on Trustpilot ↗