Hublot Big Bang Chronograph 44mm | 18kt Rose Gold – Reference 301.PB.131.RX
A Bold Fusion of Luxury & Sport, Powered by the HUB4100 Automatic Caliber

The Hublot Big Bang 301.PB.131.RX is one of the most iconic executions of the Big Bang concept, where cutting edge design meets modern horology through Hublot’s celebrated “Art of Fusion.” This 44mm chronograph combines luxurious 18K Rose Gold with rugged black elements to create a timepiece that is unmistakably bold yet refined enough for everyday wear.

The 44mm case is crafted from 18kt Rose Gold, Hublot’s proprietary gold alloy engineered for richer tone and improved durability. This warm, lustrous metal contrasts dramatically with the black composite resin bezel insert, secured by six signature H-screws, an instantly recognizable hallmark of the Big Bang collection. The black dial continues the theme, set with Arabic numerals in a striking rose gold tone, giving the watch a sporty, high-visibility aesthetic. Three chronograph subdials and a date window at 4:30 enhance functionality while maintaining clean symmetry.

Powering the watch is the Hublot Caliber HUB4100, a reliable automatic movement beating at 28,800 vph with a power reserve of approximately 42 hours. It provides chronograph functionality with precision timing while keeping maintenance efficient and dependable. The movement is visible through the sapphire crystal case back, showcasing Hublot’s modern finishing and the custom rotor design.

The watch is paired with Hublot’s signature black structured rubber strap, known for its exceptional comfort, durability, and ability to withstand daily wear in any environment. The combination of warm gold and deep black gives the piece both luxury presence and athletic character.