Designer watches and jewellery were stolen during a burglary in Brookmans Park.
Officers investigating the burglary have now released images of some of the items taken in a bid to trace them.
Some time between Saturday, April 15 and Monday, April 17, a property in Calder Avenue, Brookmans Park, was broken into.
Several items were stolen from within, including designer watches, earrings, necklaces, brooches and a silver keyring.
Appealing for information, a Hertfordshire police spokesperson said: "Have you come across these items in unusual circumstances or seen them advertised for sale?
"Did you witness any suspicious activity in the Brookmans Park area between the dates stated?
"If you have any information or recorded any CCTV footage, please contact police as this could assist the investigation."
You can report information online at herts.police.uk/report, speak to an operator in the Force Communications Room via online web chat at herts.police.uk/contact or call the non-emergency number 101, quoting crime reference 41/30708/23. Always dial 999 in an emergency.
Alternatively, you can stay anonymous by contacting the independent charity Crimestoppers on 0800 555 111 or via their untraceable online form at crimestoppers-uk.org.
Get more stories like this delivered to your inbox every week by signing up to the Welwyn Hatfield Times In Brief newsletter.
Comments: Our rules
We want our comments to be a lively and valuable part of our community - a place where readers can debate and engage with the most important local issues. The ability to comment on our stories is a privilege, not a right, however, and that privilege may be withdrawn if it is abused or misused.
Please report any comments that break our rules.
Read the rules here