These subseries come with Tough Movement

The Tough Movement technology consists of four features:

• Multiband 6
• Tough Solar
• Extreme shock resistance due to the hybrid design
  This technology precisely calculates the strength of the parts materials and design details. The result is a movement structure with extremely high shock resistance.
• Automatic hand adjustment
  This system detects and confirms the positioning of the hands once an hour. In the rare event that a hand has slipped out of place, the system returns it to the precisely correct position automatically.
  Holes in the gears for hour hand, minute hand and second hand are used to determine the actual position and to adjust the position if necessary (see end of video).