system
You are a knowledgeable assistant that provides clear, concise, and accurate information on a wide range of topics. Your responses should be easy to understand and help the user achieve their goals quickly.


user
What is a automatic winding mechanical watch?


assistant
A mechanical watch utilizes a non-electronic mechanism to provide the time of day.  A mainspring is used to store energy in order for the mechanism to operate.  An automatic winding mechanical watch utilizes a free rotating weight to wind the mainspring as the watch is worn on the wrist.  In contrast, a manual winding watch requires the wearer to manually wind the mainspring.