How to tell if a watch is a mechanical watch or a quartz watch

Give you a watch, how can you tell if it's a quartz watch or a mechanical watch?

The most intuitive way is to look at the logo, mechanical watches will have AUTOMATIC letters, and quartz watches usually have the word QUARTZ.

It can also be distinguished by the second hand movement. The second hand of the quartz watch is jumping and walking second by second, while the second hand of the mechanical watch is continuously across the disk.

Therefore, the sound of the second hand of the two watches is also different, and the rhythm of the mechanical watch is more urgent, which can also be distinguished by sound.

Because the mechanical watch uses the twisting of the spring to generate power to make the pointer move, it can also be judged by this point.

What other methods do you know?