Etiquette does not dictate which arm to wear a watch. This is mostly a matter of preference but most people find it comfortable to wear it on the left arm.
The arm you don't write with
Your left!:)
Left
Everyone that I know that is right handed, wears their watch on the left arm, regardless of their gender. Left handed people often wear their watch on the left arm.
men where watches on there left arm
"Watch" as a verb means to observe or look at something. "Watch" as a noun refers to a timepiece worn on the wrist, often used to tell time.
The left wrist is the watch wrist for both men and women.
It doesn't matter; just preference!
Pilots us left arm for steering - right hand for controls - natural then for watch to be read on right arm.
men always on there left
Its really a simple reason. In combat you are less likely to damage the face of the watch when it is on the inside of your arm.
A women wears her watch on whichever side she feels like wearing it. In my experience, people tend to wear their watch on their less dominant arm. There are left-handed versions that have the controls on the left side of the watch case.