====== Hublot Big Bang Meca-10 42 mm ======

{{wst>image_cr|Hublot|Big Bang Meca-10 Titanium 42 mm}}
{{wst>image_cr|Hublot|Big Bang Meca-10 Titanium 42 mm back}}

**Big Bang Meca-10** is a line of wristwatches from [[Hublot]].

Unlike the well-known chronographs in the [[Big Bang]] line, this series—first launched in [[2016]]—features [[hand-wound]] watches. On the one hand, they attract attention with spectacular views of the movement from both the front and the back; on the other hand, they also feature a very long power reserve of 10 days and a [[power reserve indicator]].

This indicator is driven by a “Crémaillère” rack-and-pinion system—a rarity in mechanical watches—in which a rack meshes with a spur gear to produce linear motion. Upon closer inspection, this system proves to be more subtle than it might seem at first glance. It consists of two discs stacked one above the other, which rotate in opposite directions and are connected by a spiral spring that is wound in the center, much like the mainspring. This creates an extremely unusual differential display that is nonetheless intuitive to read.

The case is made of [[titanium]], a lightweight yet highly durable metal that gives the watches a modern look. Variants are also available in King Gold and black [[ceramic]].

In [[2025]], the series was released with a case reduced in size from 45 mm to 42 mm and an optimized movement. 

<WRAP ud ud_mod>
**Reference:**
  * 421.NX.1170.RX Titanium 42 mm
  * 444.OX.1180.RX King Gold 42 mm
  * 444.QN.1170.NR Frosted Carbon 42 mm

**Movement:**
  * [[Hand-wound]] [[manufacture movement]] [[HUB1205|HUB1205]], 21,600 vph (3 Hz)
  * [[Skeletonized]], with power reserve indicator
  * 264 components
  * Power reserve: 10 days ([[double barrel]])

**Case:**
  * Satin-finished and polished [[titanium]], Grade 5 / King Gold / Black [[ceramic]]
  * Ø 42 mm, thickness  13.9 mm
  * Satin-finished titanium with 6 H-shaped titanium screws
  * [[Sapphire crystal]]
  * Case back with [[sapphire crystal]]
  * [[Water-resistant]] to 10 atm

**Dial:**
  * Skeletonized

**Functions:**
  * Hours, minutes, [[small seconds]]
  * Power reserve indicator

**Strap:**
  * Black textured and lined [[rubber]]
  * [[Folding clasp]] in titanium / King Gold / black ceramic

**Price** (2026):
  * €24,700 Titanium 42 mm
  * €25,900 King Gold 42 mm
  * €29,400 Frosted Carbon 42 mm
</WRAP>

{{tag>Watch-models Manual_winding Hublot_models}}