Antique pocket or wristwatch can be easily adjusted, because their mechanism consists of a spring and a pendulum.
You will need
- - any other watches
- - flat screwdriver
- - a figured screwdriver
- - Loupe
- - toothpick
Pull the head of the winding toward you, and then start rotating it clockwise. When the hands show the current time, press the crown, and then rotate until it stops.
Synchronize time on the antique clock and on any others. Put them face down and leave for a day.
After a day, check the time on both hours and write down how busy or lag the custom clock is.
Check how well the back opensWatch cover. If it is screwed, it can easily be opened by turning it counter-clockwise. If there is a latch or you could not find the protrusion - then it is necessary to pry off the lid with a flat screwdriver.
Use the magnifying glass to locate the clock control. It looks like a tiny arrow, fixed over the spring.
By default the controller is in the center of the clock mechanism, and on the sides there are the signs "-" or "S" (ie slower) and "+" or "F" (ie faster).
Using the toothpick, carefully move the arrow-pointer toward the "+" or "-".
Again, measure the current accuracy of the ancient clock. Sometimes, to achieve the final result, you need to twist the regulator a few times.