As I recall, you may have to add insurance to get a signature confirmation. They DO NOT offer tracking after it leaves the US.
For what it's worth, Joshua requests shipping it back standard air mail cause it's got to go back through Chinese Customs, and they will confiscate it. You should ask your dealer what he recommends and if he will be responsible for loss or seizure.
I've sent back a half dozen watches and they've all arrived, although sometimes it takes a month or more for the dealer to receive it.