MB&F Turns HM4 Thunderbolt Prototype Into Piece Unique

In 2010, MB&F launched the HM4 Thunderbolt. This aviation-inspired watch was even among the rest of the collection of the brand an eyecatcher. That same year it also won the prize for Best Concept & Design Watch at the Grand Prix d'Horlogerie de Genève (GPHG). Its construction, of both the case and the movement, was complex, even by MB&F standards. Only 100 were made, the last one being delivered to a collector years ago. To commemorate its 10th anniversary did MB&F turn the original prototype of the HM4 Thunderbolt into a piece unique.