This replica square bang 0180 42mm introduces King Gold into the Square Bang Unico equation through reference 821.OM.0180.RX. The OM designation points to King Gold with a satin finish, giving the warm alloy a more textured and understated surface than a full-polish treatment would provide. At 42mm the Square Bang’s angular geometry already makes a visual statement, and dressing those flat planes in proprietary gold alloy shifts the entire character from sporty tool toward structured luxury.

Technical Overview

• Case diameter: 42mm square cushion
• Reference: 821.OM.0180.RX
• Case material: King Gold (proprietary red gold alloy)
• Finish: satin brushed across case flanks
• Bezel: King Gold with H-shaped screws
• Crystal: sapphire with anti-reflective coating
• Movement: Unico automatic chronograph
• Functions: chronograph, date, flyback

King Gold is Hublot’s proprietary alloy that maintains its red-gold warmth longer than standard 18k rose gold by incorporating platinum into the mixture to resist oxidation and color fade over time.

Inside the Movement

The Unico column-wheel chronograph caliber powers the 0180 references with the same flyback functionality found across the Square Bang line. Through the sapphire caseback you see the automatic rotor and chronograph bridge assembly, now framed by the warm glow of King Gold case walls instead of the cooler tones of titanium or ceramic. The warm metal reflects differently through the movement view, adding depth to the mechanical landscape visible from behind. The polished 821.OX.0180.RX shares this same gold alloy but with a mirror finish that changes the light interaction entirely. Exploring the full Square Bang range reveals how surface finish alone transforms the personality of identical architecture.

What Sets It Apart

Satin-finished gold creates an unusual tension between luxury material and industrial surface treatment. Most gold watches pursue high polish, but the OM variant deliberately chooses a matte texture that highlights the flat-plane geometry rather than reflecting light uniformly. The result is a gold Square Bang that reads as modern and architectural rather than traditionally opulent. Weight-wise, King Gold adds substantial heft compared to the titanium NX references, anchoring the watch firmly on the wrist. This replica square bang 0180 42mm offers the warmth of precious metal filtered through the angular design language that makes the Square Bang unlike anything else currently in production.