Burglars took jewellery and cash from a house in Kettering after breaking in through a window.
The house in Rockingham Road was broken into some time between 1pm and 2.20pm on Sunday, July 5.
Officers investigating the case would like to speak to anyone who saw two white men wearing dark clothing in the area at the time.
It is believed they may have got into a car which was parked nearby.
Witnesses, or anyone who has any information about this incident, can call Northamptonshire Police on 101.
Alternatively, they can call the independent charity Crimestoppers anonymously on 0800 555 111.