Hublot has unveiled its first Square Bang model featuring a tourbillon and 4-day power reserve, introducing a number of technical and design firsts for the Swiss watchmaker.
The Square Bang Tourbillon 4-Day Power Reserve is the latest addition to the Square Bang line, which joined the Big Bang family in 2022. It marks a significant departure from traditional watchmaking norms by presenting a completely right-angled movement architecture within a square 42mm case.
The manual-winding MHUB6023 movement, developed entirely in-house, comprises 174 components and 25 jewels. It operates at a frequency of 3Hz (21,600 vibrations per hour) and delivers a minimum 96-hour power reserve. All bridges in the calibre are square or rectangular, contributing to a fully geometric visual aesthetic. Surfaces combine matte and satin finishes to enhance depth perception across the openwork design.
The layout of key components reinforces this structure: the winding mechanism is positioned on the right, the power reserve indicator on the left, the barrel at the top, and the tourbillon at the bottom. A skeletonised dial offers unobstructed views of the mechanism, including the silicon escapement, which improves resistance to magnetic interference and temperature variation.
Julien Tornare, CEO of Hublot, stated: “Until now, advances in square watches have been rather timid, usually confined to the case alone. With the Square Bang Tourbillon 4-Day Power Reserve, we wanted to take the exercise to its logical conclusion, by designing a movement whose architecture is also fully right-angled.”
The watch’s exterior features a new 3D carbon fibre case and bezel, reinforced with six H-shaped titanium screws. The carbon is woven into a vertical and horizontal pattern, in line with the square motif of the case. A sapphire crystal with anti-reflective treatment protects both the front and back. The strap is made from black structured rubber, echoing the square pattern, and is secured by a black ceramic and black-plated titanium deployant clasp.
Priced at 105,000 USD, the Square Bang Tourbillon 4-Day Power Reserve represents a blend of form and function, and marks a new chapter in Hublot’s pursuit of unconventional horological design.
