- Automatic winding or self-winding—in order to eliminate the need to wind the watch, this device winds the watch’s mainspring automatically using the natural motions of the wrist, with a rotating-weight mechanism.
- Calendar—displays the date, and often the weekday, month, and year. Simple calendar watches do not account for the different lengths of the months, requiring the user to reset the date 5 times a year, but perpetual calendar watches account for this, and even leap years.An annual calendar does not make the leap year adjustment, so the date must be reset on March 1 every fourth year.
- Alarm—a bell or buzzer that can be set to go off at a given time.
- Chronograph—a watch with additional stopwatch functions. Buttons on the case start and stop the second hand and reset it to zero, and usually several subdials display the elapsed time in larger units.
- Hacking feature—found on military watches, a mechanism that stops the second hand while the watch is being set. This enables watches to be synchronized to the precise second. This is now a very common feature on many watches.
- Moon phase dial—shows the phase of the moon with a moon face on a rotating disk.
- Wind indicator or power reserve indicator—mostly found on automatic watches, a subdial that shows how much power is left in the mainspring, usually in terms of hours left to run.
- Repeater—a watch that chimes the hours audibly at the press of a button. This rare complication was originally used before artificial lighting to check what time it was in the dark. These complex mechanisms are now only found as novelties in extremely expensive luxury watches.
- Tourbillon—this expensive feature was originally designed to make the watch more accurate, but is now simply a demonstration of watchmaking virtuosity. In an ordinary watch the balance wheel oscillates at different rates, because of gravitational bias, when the watch is in different positions, causing inaccuracy. In a tourbillon, the balance wheel is mounted in a rotating cage so that it will experience all positions equally. The mechanism is usually exposed on the face to show it off.
|Zenith Academy Christophe Colomb Equation of Time $219,000|
|Hublot Cathedral Minute Repeater Tourbillon and Column Wheel Chronograph $335,000|
|DeWitt Twenty-8-Eight Regulator A.S.W. Horizons $274,000|
|A. Lange & Soehne Richard Lange Tourbillon Pour le Mérite $192,000|
|Antoine Martin QP01 $88000|
|Audemars Piguet Millenary Minute Repeater $375,000|
|Louis Moinet Astralis $310,000|
|Harry Winston Optus Eleven $230,000|
|4N 4N-MVT01D01 $192,000|
|Vacheron Constantin Patrimony Contemporaine Quantième Perpétuel $78,000|
|Van Cleef & Arpels Poetic Complication 5 Weeks in a Balloon $120,000|
|Louis Vuitton Tambour Mystérieuse $260,000|
|Blancpain Tourbillon Skeleton $170,000|
|Girard Perregaux High Jewellery, Tourbillon With Gold Bridge $515,000|
|Girard Perregaux Tourbillon with three gold Bridges $180,000|