This replica square bang 0170 black takes the 821.HX.0170.RX platform and applies a full black treatment across the case, bezel, and dial. The result is a monochromatic square-cased chronograph where texture and finishing do all the visual work instead of color contrast. At 42mm the Hublot Square Bang Unico already commands attention through its angular silhouette, and the all-black execution adds stealth presence that tones down the geometric boldness just enough for versatile daily wear.

Case & Movement Specs

• Case diameter: 42mm square cushion
• Reference: 821.HX.0170.RX (black edition)
• Case material: composite with black PVD-style treatment
• Bezel: black with exposed H-shaped screws
• Crystal: sapphire with anti-reflective coating
• Movement: Unico automatic chronograph
• Functions: chronograph, date, flyback
• Strap: black structured rubber

In the black execution, the H-shaped bezel screws nearly disappear into the surrounding surface, becoming visible only when light catches their polished tops against the matte bezel background.

Caliber Breakdown

The Unico movement behind this reference features a column-wheel chronograph architecture with flyback capability. Through the skeletonized dial you can trace the chronograph bridge and escapement even in the darkened configuration, though the view is subtler than on lighter-dial variants. The black date wheel integrates seamlessly into the overall monochromatic theme. For a Square Bang with the same movement but in a different material story, the 821.NM.0170.RX offers an interesting alternative. Both share the Square Bang DNA with identical case geometry but diverge completely in surface treatment and visual tone.

How It Compares

All-black watches tend to photograph darker than they appear on the wrist, where subtle differences between brushed flanks and polished edges become apparent in natural light. The 821.HX in black avoids the common trap of looking flat or featureless by maintaining distinct finishing zones across the case architecture. Matte sides contrast with satin top surfaces, and the polished screw heads add controlled highlights. This replica square bang 0170 black delivers the angular Square Bang identity filtered through a murdered-out aesthetic that stays readable in person.