Mechanical

— a traditional type of watch movement that uses a compressed spring as its power source. One of the advantages of such watches over quartz ones is that they do not require a battery – you just need to wind the spring regularly, which can easily become a habit; and if there is a self-winding mechanism (see the relevant paragraph), the matter is simplified even more. Mechanical models are noticeably more expensive than quartz ones, although this can also be an advantage, emphasizing the status of the owner. But the clear disadvantage of this option is the relatively low accuracy: if in a quartz watches the error is measured in seconds per month, then in mechanical models we are talking about seconds per day. So, it is worth paying attention to this option either for fundamental connoisseurs of the classics, or for those for whom it is important for their occupation to have a watch that does not depend on batteries (travellers, sailors, military personnel, etc.).