from 2.190

The PIONEER Mk I is the replica of the “Calibre 40”, the first precision chronograph produced by Hanhart in 1938. All of the chronograph functions on this unconventional model – start, stop and zero setting – are performed by a single button and always strictly follow each other. Unlike its two-button equivalent, the seconds hand on this chronograph cannot be restarted from the point at which it is stopped; the next press of the button invariably returns the spring to the original starting point. This meant that the automatic Calibre used for the Mk I also had to be redesigned slightly.


  • Automatic chronograph movement HAN3601
  • Basis: ETA7753
  • Mono-pusher conversion
  • 28,800 vibrations per hour, 4 Hz, 27 jewels
  • Power reserve of min. 42 hours


  • Small second
  • 30-minute counter


  • Stainless steel
  • Diameter 40 mm, height 15 mm
  • Large crown and red button
  • Fluted rotating bezel
  • Anti-reflective convex sapphire glass
  • Screwed-down case back
  • Water-resistant to 10 bar/10 ATM


  • Off-white or black
  • Super-LumiNova® coated numerals and hands


Calfskin or stainless steel