Pioneer Collection -  
 

pioneer
PIONEER Mk I

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. 

Movement: Modified automatic chronograph movement (bicompax), based on the Valjoux 7750 calibre, with increased crown-to-button spacing and single-button conversion; 28,800 vibrations per hour, 4 Hz; 27 jewels; power reserve of min. 42 hours
Functions: Small seconds at 9 o’clock, 30-minutes counter at 3 o‘clock
Case: Stainless steel; red button; fluted, bidirectional rotating bezel with red marking; convex, internally anti-reflective sapphire glass; screwed-down case back; large crown with deep bevelled edge; diameter 40 mm, height 15 mm; water-resistant to 100 m/10 bar
Dial: Black; Super-LumiNova®-coated, luminous numerals and hands
Strap: Calfskin with riveting; pin buckle made from stainless steel 

Reference number: