Police hope distinctive cuttings made in a carpet dumped with the body of a woman on a Manchester building site could hold the key to identifying her.
Workmen found the skeleton wrapped in a blue carpet on Angel Meadows, off Angel Street, in Collyhurst in January.
The woman was Caucasian and aged between 18 and 35 but it is not known how long her remains were at the site.
Detectives have now released images of a carpet the woman may have been wrapped in.
Images of other pieces of carpet found with the body, some of which have distinctive cuttings, have also been made public by police.
Detectives have also examined a distinctive pinafore dress, known to have been made on an industrial machine, a jumper, bra and Guinness sign that were also recovered.
It is believed the dress belonged to the woman, but she was not wearing it when her body was dumped.
Police have also obtained a DNA profile of the woman and are working through missing person reports in an attempt to identify her.
This will be done by checking the DNA profile against familial DNA of relatives where a missing person report has been made.
Det Ch Insp Jeff McMahon, of the Major Incident Team, said: "This remains a lengthy and painstaking investigation but we are meticulously working through the evidence and I am hopeful we will identify this woman and get her the justice she deserves.
"I want people to look very closely at the carpets we recovered with the body.
"Some have very distinctive cuttings and markings, suggesting it may have been fitted on stairs and I believe it is more likely to have come from a commercial establishment rather than someone's home.
"We have had a great response from members of the public so far and if you think you recognise the carpets or the markings please get in touch."