Before you shop for your next watch, be it a Citizen watch or an Invicta watch or any watch for that matter, it is a good idea to know how watches are classified. Watches are generally classified as either quartz watches or mechanical watches. Mechanical watches are further broken down to automatic watches (automatic winding) and manual wind watches. Mechanical watches consist of all mechanical components and hence the name mechanical watches. Mechanical watches do not need battery. Quartz watches do need battery. Quartz watches gets their name from the quartz crystal that is in use in the movement. Pearls jewelry resources