Secret Watch Compartment
A place where nobody suspects.
Take the Back Off
You will have to unscrew or pry off depending on what kind of watch you have.
Take the Insides Out
You might need to break some things in there, so grab some tools necessary for doing so.
Put a Different Back on It.
I chose to tape a piece of paper onto it since nobody is going to be able to see it, but you can use whatever you want.
Putting Things in It.
Simply lift up your cover, put something in, and put the cover back.