Regulation is the fine tuning of a watch with mechanical oscillating system. There are different methods and qualities

• With normal regulation the rate of a wristwatch is measured with “dial up” and “crown above” and adjusted to a rate deviation of a maximum of 30 seconds.

• With regulation in various positions one regulates in 2, 5 or 6 positions, such as
  • horizontal “dial up”, “dial down” and
  • vertical “crown up”, “crown left”, “crown right”, “crown down”.

• With regulation of the temperature compensation the rate is measured and regulated at 4°, 20° and 36°C, in each case for 24 hours.

• by regulator
• Swan's neck fine regulation
• by screw balance
• by Microstella weight screws (Rolex-spezific procedure with screws inside the balance wheel)
• etc.

• The Rolex Microstella Tool