Several thousand pounds worth of watches and jewellery were stolen after a house in Top Street, Bolney, was broken into on Thursday (April 16).
Missing items include a Breitling Chronomat watch and a Gucci diamond watch.
The thief or thieves struck between 8.45am and 2.35pm.
Anyone who saw anything suspicious or who may have other information is asked to email firstname.lastname@example.org or phone 101, quoting serial 954 of 16/4.
Alternatively they can contact the independent charity Crimestoppers without having to leave their name on 0800 555 111.