This replica big bang 1180 45mm takes the Unico flyback chronograph platform and wraps it in 18K king gold with a full diamond bezel, referencing 441.OX.1180.RX.1704. The OX prefix in Hublot’s naming convention designates king gold, the brand’s proprietary rose gold alloy engineered for superior color retention. Combined with the 1704 diamond bezel suffix, this sits among the most luxurious configurations in the current Unico catalog. The skeletal dial beneath the diamonds exposes column wheel mechanics, creating a visual stack of movement architecture under precious stones.

Technical Overview

• Case diameter: 45mm
• Case material: 18K king gold (proprietary rose gold alloy)
• Bezel: king gold with factory-set diamonds (1704 configuration)
• Crystal: sapphire with anti-reflective coating
• Dial: skeleton showing Unico movement architecture
• Strap: rubber with king gold deployment clasp
• Movement: Unico automatic flyback chronograph
• Functions: hours, minutes, flyback chronograph, date, visible column wheel

The Unico flyback function allows instant chronograph reset and restart without the stop-reset-start sequence. The column wheel at 6 o’clock orchestrates this operation visibly through the skeleton dial.

Inside the Movement

Hublot’s Unico caliber runs at 28,800 vibrations per hour with a power reserve near 72 hours. The flyback complication and column wheel are both visible from the dial side, which inverts the typical approach of hiding complications behind the caseback. The chronograph minutes counter at 3 o’clock and running seconds at 9 o’clock use contrasting sub-register colors against the skeletonized main plate. If you prefer the same diamond layout on a lighter, more tool-oriented platform, the 411.OM.1180.RX in mango gold offers a different gold tone without diamonds. Both sit in the Big Bang collection but target distinct buyer profiles.

What Sets It Apart

Placing diamonds on a skeleton dial chronograph is a deliberate design statement that very few watchmakers attempt at this scale. Most diamond-set watches use solid dials where the stones become the visual focal point. Here, the movement architecture competes with the bezel for attention, and that tension defines the character of this piece. King gold adds warmth that complements the diamond sparkle more naturally than white metals would. This replica big bang 1180 45mm represents the intersection of horology and high jewelry within the Unico framework.