A pusher, or push piece, is a button that when pressed, activates a function of the watch, such as an alarm, chronograph, or date corrector.
The crown is a button on the side of the watch that is used to set the time and date, essentially moving the hands of the watch. If the watch is mechanical, the crown also winds the watch. The crown is often ridged to make grasping easier.
The case is the housing that contains the watch dial and parts for movement. Cases are most commonly made of stainless steel, but precious metals like gold and silver are also used.
Crystal / Lense
The lense is the transparent protective covering of the watch face. Most often made of sapphire crystal due to its scratch resistant quality, lenses can also be made of plastic, acrylic and mineral glass crystal.
The date window on the dial of a watch reveals the numerical day of the month. Some watches also display the day of the week.
The bezel surrounds the crystal and secures it to the watch. Some bezels are numerically marked and movable, they are used for measuring time. Other bezels are fixed and feature a scale of one type or another.
The dial is essentially the face of the watch, displaying the time, movement, and other functions.
A subsidiary dial on a watch face is used for a number of purposes such as indicating the date, displaying the chronograph or multiple time zones. Some watches have up to 4 sub-dials.
The hands of the watch indicate the time as well as other functions the watch may feature. The Hour, Minute and Second hands represent the time. The hands of sub-dials depend on the function of the sub-dial. Frequently, the hands of the watch are luminous so the wearer can tell the time in the dark.
Water resistance refers to the structural integrity of that watch and its ability to resist moisture damage. Water resistance can fade as the watch ages and endures wear and tear. Water resistance ratings are always based on watches that are in good working condition.
Be sure that the crown is pushed or screwed down completely before entering the water Do not use buttons or pushers while the watch is under water. Water resistance ratings apply to water 60 degrees and above. It is not recommended to wear your watch while bathing as soaps and shampoos are corrosive. Leather wrist watch straps should never get wet. It’s important to understand that no watch is 100% “waterproof”.
30 Meters – The watch can handle hand washing, light rain and light splashes.
50 Meters – The watch can sustain light swimming but should not be submerged for extended periods.
100 Meters – The wristwatch can withstand extended submersion when doing activities like surfing, swimming, or rafting.
200 Meters – The watch is suitable for professional marine surface activity.
300 Meters or greater – These watches are suitable for diving at depth (in a non-helium rich environment).