Hublot’s Square Bang UNICO lineup documented here comprises 42 mm watches with the same HUB1280 UNICO flyback chronograph movement but different case materials, water-resistance ratings and straps. The clearest practical distinction is the Sapphire model’s 50 m / 5 ATM rating; the cited Titanium, Black Magic, Titanium Ceramic and Titanium Diamonds models are rated to 100 m / 10 ATM. This is a specifications guide, not a report of physical handling or independent testing.
What distinguishes the Square Bang UNICO models?
All five current material variants listed below have a 42 mm case and Hublot’s HUB1280 UNICO self-winding flyback chronograph movement, with approximately 72 hours of power reserve according to Hublot’s official product pages, accessed in 2026. Their main differences are the case and bezel materials, water resistance, and—in the models whose pages specify them—the strap or clasp.
| Model | Reference | Case and bezel | Water resistance | Strap or clasp details | Price information |
|---|---|---|---|---|---|
| Square Bang UNICO Titanium 42 mm | 821.NX.0170.RX | Satin-finished and polished titanium case and bezel | 100 m / 10 ATM, per Hublot’s current product page, accessed in 2026 | Black structured rubber strap; titanium deployant buckle | Not stated on the US product page surfaced for this guide (Hublot, accessed 2026) |
| Square Bang UNICO Black Magic 42 mm | 821.CI.0170.RX | Microblasted and polished black ceramic case and bezel; H-shaped titanium screws | 100 m / 10 ATM, per Hublot’s current product page, accessed in 2026 | Black structured rubber strap; clasp detail not stated on the cited page | Not stated on the cited Hublot product page (accessed 2026) |
| Square Bang UNICO Sapphire 42 mm | 821.JX.0120.RT | Polished sapphire crystal case and bezel | 50 m / 5 ATM, per Hublot’s current product page, accessed in 2026 | Transparent lined strap; clasp detail not stated on the cited page | USD 109,000 on Hublot’s US page, accessed in 2026; VAT excluded |
| Square Bang UNICO Titanium Ceramic 42 mm | 821.NM.0170.RX | Titanium case; black ceramic bezel | 100 m / 10 ATM, per Hublot’s current product page, accessed in 2026 | Not stated on the cited page | Not stated on the cited Hublot product page (accessed 2026) |
| Square Bang UNICO Titanium Diamonds 42 mm | 821.NX.0170.RX.1204 | Titanium case; bezel set with 44 diamonds | 100 m / 10 ATM, per Hublot’s current product page, accessed in 2026 | Not stated on the cited page | Not stated on the cited Hublot product page (accessed 2026) |
| Square Bang UNICO White Ceramic | 821.HX.0170.RX | Archived official listing identifies white ceramic | Not established by the surfaced archive (Hublot archive page timestamped 2023-04-26) | Not stated in the surfaced archive | SAR 113,700 on Hublot’s archived listing timestamped 2023-04-26; historical regional price, not a current quote |
How the movement and specifications compare
Shared HUB1280 movement
Hublot identifies the movement as the “HUB1280 UNICO Manufacture Self-winding Chronograph Flyback Movement with Column Wheel.” Its product-page explanation describes a double-clutch system and a column wheel on the dial side. Hublot gives an approximately 72-hour power reserve for the cited variants. The brand’s UNICO description says: “Its construction of 354 components has been simplified as much as possible to improve reliability and robustness.” That is Hublot’s description of its design intent, not an independent reliability or durability finding.
Water resistance is not identical across the family
Hublot lists 100 m / 10 ATM for the Titanium, Black Magic, Titanium Ceramic and Titanium Diamonds pages cited above. The Sapphire page lists 50 m / 5 ATM. The archived White Ceramic listing does not establish a water-resistance figure. These are manufacturer ratings, not a claim about the condition or service history of a particular watch.
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- Compatible Watch Models: Perfect Compatible with Hublot Big Bang 19mm×25mm×22mm Series Watches,
- Product Include: 1× replacement watch band(without metal buckle) + 1× strap removal tool+ 2× Spring Bar+strap outer packaging. Using the included replacement tool, you can quickly install the strap.
- Select The Appropriate Width: Replacement for Hublot Big Bang 19mm×25mm×22mm. As the Picture , Measure the size near the strap buckle or the inside of the strap.
- High Quality Materials: High quality rubber material, waterproof and sweatproof, dust-free replacement Hublot Big Bang 19mm×25mm×22mm watch strap
- Have any questions on how to choose the size, please contact customer service
Which version fits which preference?
- Titanium: the documented option with a titanium case and bezel, a black structured rubber strap and a titanium deployant buckle.
- Black Magic: uses black ceramic for both case and bezel, with H-shaped titanium screws.
- Sapphire: stands apart for its polished sapphire crystal case and bezel, transparent lined strap and lower stated water-resistance rating of 50 m / 5 ATM.
- Titanium Ceramic: combines a titanium case with a black ceramic bezel.
- Titanium Diamonds: pairs a titanium case with a bezel set with 44 diamonds.
- White Ceramic: appears in Hublot’s archive; the cited archived page does not establish current availability or a water-resistance figure.
These distinctions describe published construction and specifications. The pages cited here do not establish comparative comfort, scratch resistance in use, timing performance, or how any variant wears on an individual wrist.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.Prices, availability and warranty
The only current regional price established in the cited product pages is USD 109,000 for the Sapphire on Hublot’s US page, accessed in 2026; the page states that VAT is excluded. The Titanium US page surfaced for this guide did not expose a price, and the cited pages do not establish prices for the other current variants. The White Ceramic figure of SAR 113,700 belongs to an archived Hublot listing timestamped 2023-04-26, so it is historical rather than a current quotation and should not be compared with the Sapphire US price without accounting for date, currency and tax treatment.
Rank #2
- Compatible Models: 44.5mm Hublot Big Bang Luna Rossa 301.CM.131.RX.LUN06 , 301-CM-131-RX-LUN06, 301/CM/131/RX/LUN06, 301CM131RXLUN06 watches which has 25mm at lugs and 22mm at the buckle
- Detailed Sizes: Lug Size: 25mm; Lug Smaller Size: 19mm; Width at Buckle: 22mm; Length: 100/80mm
- High-quality rubber and stainless steel watch band & clasp.
- Package Including: 1 set (2 rubber strap) And 1 Clasp
- Your Satisfaction Is Our Highest Priority. Pls Contact Us If You Have Any Questions, We Will Try Our Best To Serve For You.
Confirm live price, stock and the exact reference with Hublot or an authorized retailer; a listing’s presence in search results alone does not establish that a seller is authorized. Hublot’s surfaced warranty document states that watches purchased through its Official Network—Hublot boutiques, authorized retailers or Hublot e-commerce—from 1 January 2026 receive a five-year international warranty. Hublot product-page text says an additional five-year extension may be available through Hublotista for eligible watches bought from that date, subject to conditions. Check the terms that apply to the country, seller, reference and purchase date.
Quick Recap
Best Value
- Compatible Watch Models: Perfect Compatible with Hublot Big Bang 19mm×25mm×22mm Series Watches,
- Product Include: 1× replacement watch band with mental buckle+ 1× strap removal tool+ 1×screwdrivers+ 2× Spring Bar+strap outer packaging. Using the included replacement tool, you can quickly install the strap.
- Select The Appropriate Width: Compatible with Hublot Big Bang size (19mm×25mm×22mm) straps, Measure the size near the strap buckle or the inside of the strap.
- High Quality Materials: High quality Leather material, waterproof and sweatproof, dust-free. Compatible with Hublot Big Bang size (19mm×25mm×22mm) straps.
- Have any questions on how to choose the size, please contact customer service
Rank #4
- Made of non-allergic natural resin, waterproof, soft, light, durable, comfortable to wear
- It is suitable for Hublot Big Bang 25 * 19 * 22mm interface watch band , not for other watches
- It is very important to choose the correct model. To avoid the trouble caused by the return and exchange of goods, if you have any questions about the model and size of the watch, please feel free to contact us
- Package included: 1 * Rubber strap (without metal buckle), 1 * tool kit, easy replacement with our free tools. The watch has a new look! It is not the original and is a good substitute
Rank #3
- Compatible With: Hublot Big Bang
- Size:17*26mm; Length: 116/88mm
- This Strap is made of Highest Quality Silicone Rubber
- Package Includes: one set (2) rubber strap(with logo)
- Your Satisfaction Is Our Highest Priority. Pls Contact Us If You Have Any Questions, We Will Try Our Best To Serve For You.
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.
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