Marathon SSNAV-D AUTO Instruction Manual page 13

3. Always set it forward.
During events such as daylight-savings, you might be inclined to wind your
watch back an hour, however this can put undue stress on the movement of your
watch. Always move the hands forward to reach your desired time setting.
4. Service regularly.
Regular servicing every four to six years will help to keep your movement
running with Marathon-level precision. For servicing requests, contact our team
directly at customerservice@marathonwatch.com