Movement - The engine of the watch.

Crown - The mechanism that allows for the winding of the movement and adjustment of functions like date and time. To enhance water resistance, crowns can screw into the case to form a seal against moisture or water.

Pusher - Case attachment that controls functions, such as the chronograph or date adjustment.

Lugs- Case attachment that allows for a strap or bracelet to be attached to the watch case.

Rotor - Oscillating weight that winds an automatic watch when worn.

Strap - Commonly a leather or rubber attachment that secures a watch to the wrist. Metal attachments, generally made from stainless steel or gold, are referred to as bracelets.

Subdial - A small dial set within the main dial, which is used to display an additional complication such as chronograph readout, seconds, or date.

Exhibition Caseback - Fitted with a mineral or sapphire crystal to show movement finishing.

Hour Marker - Hour indicator applied or painted on the dial.

Case - Holds the movement and protects it from the elements. It can be made from different metals and comes in different shapes.