It happened at about 9am on September 25 when an elderly woman living on Glendale Avenue in Washington received a knock at her front door.
A man then entered the address after purporting to work for the council and claiming he was there to check the boiler.
The offender went upstairs and stole a quantity of jewellery – with the victim only becoming aware that her sentimental items have disappeared once he had gone.
The victim in this case did not get a clear view of the offender given he was wearing a blue face-mask and a hat – but police still hope somebody living in that area might have seen somebody matching the description or themselves had a similar knock on the door.
The man is described as between 5’9 and 5’11 tall, in his 40s with a possible dark beard and broad shoulders. He was said to be wearing blue gloves and a dark woollen hat.
An investigation has been launched into the incident and detectives are asking anybody who lives in the area who has information, or who believes they were approached by someone matching that description, to come forward.
Anyone with information is asked to contact police on 101 quoting log 639 300920.