Self-winding movement with 7-day power reserve and perpetual calendar programmed until 2499.
The 50611 was used from 2003 to approximately 2005.
The 51612 was used from 2005 to approximately 2007.
The 51614 was used from 2007 onwards.
All watches using this caliber:
IW5026-02 IWC Big Pilot Perpetual Calendar Stainless Steel / Black / Association Monegasque Contre Myopathie