What is quartz watch and Diving watch?
Quartz watches
It uses a “quartz crystal” as the oscillator, which has a high accuracy of time travel. Through the electronic frequency division to control the operation of the motor, drive the pointer. The electronic hand watch is a combination of an electronic movement and a quartz movement. A watch that has both an electronic display and a hand movement indicator.
Diving watch
The so-called diving watch, as the name implies, refers to a watch that has undergone waterproof treatment and is used for diving. General waterproof watches cannot be used for diving. Diving watches must comply with strict regulations. They are not waterproof enough to be called diving watches. The standard waterproof performance of the diving watch is at least 100 meters deep; there is an outer ring that can rotate in one direction on the bezel to measure the diving time; divers are often in dark water, so the pointer, scale or surface of the diving watch is usually required It is coated with fluorescent material to make it easier for users to read the time. Common diving watch brands include: Rolex, Suunto element series water spirit diving watch, Omega Seamaster Ploprof diving watch, TAG Heuer competition diving series, IWC marine timepiece series, Blansacar super submarine series and so on.