Sorry to hear about this, really does suck.
One bit of advice i can offer which really helped out when my parents were burgled a few years ago. Mum decided to visit all the local jewellers to try to find the rings, watch etc that were taken as its likely they will be porned off.
Luckily enough in one place she found one of the rings. She asked them to keep it by while she got her husband to come buy it. She went outside and phoned the inspector on the case. He came along and enterred with mum. The policeman stood there while mum ripped into the jeweler then arrested him. Mum got some bits back and felt a whole lot of anger off her chest.
You never know they may find the watch this way.
Unfortunately unless there are any witnesses its highly unlikely that the police can do anything. Sad i know. Hope everything gets resolved.
I think its one of the worst feelings to live in a house that has been burgled, you never feel safe anymore. We moved soon after