Meet the Caliber 7309, our first movement made completely in-house. A COSC certified caliber, it’s the heart of the new Engineer M Challenger, featuring an 80-hour power reserve and a frequency of 28,800 beats per hour (4 Hz). Alongside self-powered micro gas lights, the Engineer M Challenger represents a groundbreaking timepiece.
Now available for pre-order at a special introductory price starting from USD 1,699* until 31 January 2018. Limited to 1,000 pieces.
