Gears both large and small
This could lead to many things including clocks both large and small, clockwork counting and calculating devices, and even clockwork devices that do some spell like effect.
Antikythera Mechanism
Old Ben the clock tower
There are large clock towers in most larger communities and in every city. They gong on the hour. So, each hour the city will be filled with the bells, gong, or song of the clock towers.
Pocket Watches
Pocket watches are very expensive and only worn by the wealthy and ship captains. Watches are used by ship navigators to help determine where a ship is located when out to sea.