HM4 Thunderbolt by MB&F

HM4 Thunderbolt is a new watch created by Maximilian Büsser’s company MB&F. The full name of this timepiece is Horological Machine No4 Thunderbolt. Thunderbolt’s aviation-inspired design complimented with unique engine. Each of the 300-plus components – including the regulator and even the screws – was developed specifically for this watch.

Source: Maximilian Büsser & Friends