Case: the “body” of the watch. It contains the movement and is attached to the band at its ends.
Dial – The watch face on which the hands and hour markers are placed.
Hands: The hour hand, the minute hand and the second hand that keep the time.
Crown: the round-shaped winder that allows you to set the time, day, date and movement.
Crystal: the crystal that covers the sphere. It comes in sapphire glass or plastic.
Bezel: the round outer ring that seals the case.
Lugs – The two pointed edges that attach to the bracelet at the top and bottom ends of the case.
The bracelet, or band, is the piece that wraps around the wrist. It is usually made of stainless steel or gold.
Final piece: the small piece of metal that allows you to place the bracelet in the box.
Spring Bar – A thumbtack that holds the bracelet together.
Link: Each “link” forms the bracelet and can be removed or added to fit the wrist.
Rolex Aftermarket Parts – Non-Rolex parts that do not display counterfeit Rolex logos or seals.
Arbor: the axis on which a gear travels.
Baguette – Ladies’ style watch featuring a slim rectangular or oval shape.
Balance Spring: control the balance of the balance.
Bubbleback: expression used to describe the first Rolex Perpetual models, due to the thickness of the case used to house the oversized movement.
Chronograph: In addition to transmitting standard time, it also performs a time measurement function, such as a stopwatch.
Diver Extension – A hinged extension inside the watch bracelet, which allows the bracelet to be lengthened to fit the diver’s wetsuit.
Quick setting: this function allows the date to be set quickly via the wind-up crown, without the hour hand going past the 12 o’clock position.
Concealed Clasp – The clasp buckle is hidden under the bracelet links and appears to have a continuously flowing bracelet.
Stamp: a mark or seal that indicates the purity of the metal, the date or the country of importation.
Main spring: the main spring of a watch that supplies the moving force to the gear trains.
Perpetual Movement – Another term for an automatic or self-winding movement, this movement causes a weight inside the watch to rotate back and forth, keeping it in constant tension.
Serial number – A watch identification number, usually engraved between the lugs, this number can often be used to date the watch’s production.
Sweep Movement: Refers to the movement of the second hand that ticks rapidly at approximately 5-8 times per second, thus giving the illusion of sweeping.
