1. The accuracy is influenced by many factors; i.e., how the watch is shaken when on your wrist/the temperature. Even how the watch is placed (Dial-up/Dial-down affects the accuracy as well).

1. Nowadays we generally do not exercise so much, being surrounded with many conveniences. Therefore, mechanical watches may need further winding (by shaking), sometimes even if you keep wearing it.
    

How to wind the watch
Try to shake the watch or wind the crown everyday, almost at the same time if possible to obtain higher accuracy. In case of hand winding a mechanical watch, be careful to slowly wind the crown, so that you do not damage the winding mechanism.

Overhaul
Periodic overhaul is recommended (once in a three years) as some of the movement parts may need additional lubrication as they get dry. Sometimes the parts may get rusty.

An overhaul is to mechanical watches what a health check is to human beings. All the parts are completely checked, cleaned up, and properly lubricated. In addition, the gasket is to be replaced with a new one to maintain sufficient water resistant function.

How to maintain the accuracy

• Do not drop the watch
• DO not place the watch where the temperature is extremely low/high (Less that 5oC or more than 35oC)
• Wipe off water/sweat from the watch
• Keep the watch away from strong magnetism.

Have you ever had any of these experiences?

Did you know?
The accuracy of mechanical watches
Mechanical watches in general gain/lose 10-60 seconds a day (depending on the movement (mechanism) type). Accordingly, it is recommended to adjust the time often.

How to adjust the time
Mechanical watches are different from quartz watches. Pull out the crown and set the minute hand 5-10 minutes before targeted position. Then slowly wind the crown to the desired time and push back the crown.

How the second hand moves
Mechanical watches in general gain/lose 10-60 seconds a day (depending on the movement (mechanism) type). Accordingly, it is recommended to adjust the time often.

Mechanical watch structure
Parts composing the movements
The mechanical movement is composed of many tiny and accurate parts as per the below illustration.

How the hands move
The power source is the SPRING. The hands are moved by the wheels powered by the main spring while the spring uncoils.

Important notes for automatic winding watch

Dear Seiko owners,
Today, SEIKO has two types of mechanical watches - automatic winding and hand winding. Although automatic ones are regarded as convenient watches without the need to wind up like hand winding watches and to replace batteries like quartz, automatic mechanical watches need to be wound up. Above all, this is a mechanical watch.

If the watch is worn on the wrist, the mainspring will be wound automatically through normal wrist movement.

To start the watch after it stops completely, or after being repaired, wind it up by shaking from side to side until it becomes almost fully-wound (See the below picture). Then, set the time, date and day before wearing the watch on the wrist.

Once the watch is wound up fully, it operates from 40 to 50 hours approximately. If the watch is used without being wound up fully, a gain or loss of time may result. To avoid this, it is recommended that you wear the watch daily for more than 8 hours.

To wind the watch fully

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