Guys,
The watch was in a bag that she wanted to carry with her in the cabin but we were running to make the flight, the majority of the pax were onboard and she was forced against her will to check the bag when all the overhead space was full. It had other things in it but this was the only one missing.
When was it done? Who knows but when she hit CONUS and looked for her watch it was missing.
I personally do not temp the people and keep everything possible that is valuable in a carryon bag but with last weeks events that's not always possible.