The watch is considered Abandoned property
Explanation:
In the given statement the first owner of the watch was Richard since he was angry with his girlfriend due to breakup he threw the watch out of the window and it is no longer his watch.
The watch I abandoned and it is thrown outside now John a passer-by founds this watch and he loved it and owns it. In this case the watch is discarded by the owner and it is no longer used by the owner and hence it is abandoned property.