Accuracy is unstable.
The accuracy of a mechanical watch is expressed in terms of daily error. For newer models, an error of approximately +30 seconds per day is considered acceptable.
If you think it might be broken?
The accuracy can be extremely inaccurate.
Several factors could be at play.
It's possible the watch was temporarily magnetized.
It is possible that an external impact or similar event caused a malfunction in the internal machinery.
In some cases, temporary issues may resolve themselves over time, but if the accuracy problem persists for several days, repairs or other measures will be necessary.
If you take off your watch and leave it out, it won't last until the next day.
(Automatic winding) Due to short wearing times and insufficient arm movement, the mainspring may not be fully wound. Please manually wind the mainspring as an aid.
When you shake the watch, you hear a strange noise coming from inside.
In automatic watches, the sound comes from the rotor of the internal mechanism rotating to wind the mainspring. Some movements produce a louder sound than usual. If the lubrication in the internal mechanism runs out, it may not rotate smoothly and the sound may become louder, so maintenance is likely necessary. If you hear irregular noises rather than rotational sounds, it may indicate a broken part, so please have it inspected and repaired as soon as possible.
Rust has formed on the stainless steel exterior.
While stainless steel is generally resistant to rust in areas exposed to air, rust can still occur if sweat or dust accumulates in areas that are not easily exposed to air, such as the bracelet's joints. It is important to thoroughly wipe away any moisture after getting wet or sweating. We recommend removing the protective sticker on the back of the watch before use. Dust and sweat can accumulate in the gap between the sticker and the watch body, causing rust.
The date changes at noon.
It's possible that the time was set incorrectly by exactly 12 hours. Please manually advance the time by 12 hours to set the correct time.
The calendar doesn't change at exactly 12:00 AM.
Some models switch over precisely at 12:00 AM, while others gradually complete the switchover between approximately 11:30 PM and 12:30 AM; the timing varies depending on the internal mechanism.
The calendar doesn't automatically switch from February 28th to March 1st.
Except for some models, manual calendar adjustment is required the day after the end of February, April, June, September, and November.
The second hand now moves in increments of a few seconds.
Quartz This is an end-of-life (EOL) function that is installed in some watches. It is a function that warns you that the battery will run out soon. If the second hand starts to move in seconds, replace the battery as soon as possible.
The inside of the glass became foggy.
Several factors could be at play.
It is possible that moisture has entered the watch. In this case, please request repairs as soon as possible.
This may be caused by a sudden temperature change between indoors and outdoors. It is usually a temporary phenomenon that resolves quickly, but if the fogging persists for a long time, repairs will be necessary.
