A pensioner was the victim of a distraction burglary at a house in Grassmoor.
A man walked into a property in Vernon Rise and told the homeowner he needed to check the pipes in the house were not blocked.
He then asked the 69-year-old victim to accompany him to the back garden.
While they were there, a second man went upstairs and stole a cash box and a watch.
The two offenders then left the property and drove off in a black Audi A6.
Police want to hear from anyone who saw the men in the area around the time of the offence, which happened between 12.30pm and 1.30pm on Friday, April 24.
Witnesses or anyone with information should call Derbyshire police on 101, quoting crime reference 17159/15.
You can also call Crimestoppers, anonymously, on 0800 555 111.