This replica big bang 44mm features the 301.SX.130.RX reference, a stainless steel Big Bang that combines Hublot’s signature case architecture with a rubber-integrated strap and chronograph layout. The 44mm case diameter matches the original Big Bang proportions introduced in 2005, and the steel construction with polished bezel ring and satin-brushed flanks creates clear contrast lines across every surface. Inside, the automatic movement drives hours, minutes, and a date complication displayed through the aperture at three o’clock. The sapphire crystal sits flat against the bezel with minimal protrusion, keeping the overall profile measured for a watch of this diameter.

Case & Movement Specs

• Case diameter: 44mm
• Case material: stainless steel
• Reference: 301.SX.130.RX
• Bezel: polished steel, six H-shaped screws
• Crystal: flat sapphire with anti-reflective treatment
• Dial: black with applied hour markers and luminous fill
• Crown: screw-down at 3 o’clock
• Movement: automatic

The steel bezel screws on this reference maintain polished finishing on their hexagonal tops while the bezel surface itself carries a brushed texture, producing a controlled micro-contrast at each screw position.

Caliber Breakdown

The automatic movement in the 301.SX.130.RX delivers dependable timekeeping with date functionality through a proven caliber architecture. The screw-down crown system ensures the movement is sealed from moisture and dust during normal wear. Rubber strap integration uses the same H-shaped lug screws found on the bezel, creating visual continuity between case and strap. For a different perspective on the Big Bang Unico variant, the 441.RX.1170.RX.1704 diamond-set Unico adds gem-set bezel work to the same underlying case language. Both models share roots in the Big Bang lineup but diverge in finishing philosophy.

How It Compares

Among the steel Big Bangs, the 301.SX.130.RX sits as the purist’s choice. No ceramic elements, no skeleton dial, no precious-metal accents. The black-dial, steel-case formula reads as clean and direct against more elaborate references in the series. If you favor the Big Bang shape but want the lowest visual noise possible, this reference delivers exactly that balance. This replica big bang 44mm keeps the focus on case construction and proportions rather than surface decoration.