A sat-nav was stolen from a delivery lorry parked in Harlech in Corby last month.
The lorry was parked near to Sharman Drive, at about 4.20pm on Friday, June 10, when the window was smashed and the sat-nav stolen.
Police have only just released details of the incident.
Two young men on bikes were seen in the area at the time of the incident.
One was white, wearing a blue top and jeans.
Officers would like to speak to anyone who may have witnessed this incident or who may have any information regarding it.
Witnesses or anyone with information about this incident can contact police on 101 or Crimestoppers anonymously on 0800 555111.