West Yorkshire Police has re-issued a mysterious appeal in an effort to find a woman believed to have lived in the Burley area of Leeds in the late 1970s.
Officers want to speak to Katherina Gill but have said she is not missing and is not a crime suspect.
A previous appeal to trace her was made in summer last year but did not lead to her being found.
Since then officers have continued to try and find her but without success.
The appeal states: "Very little is known about Katherina although it is believed she would now be aged around 63 and that Gill was her birth or maiden name.
"She may have married or changed her name from Gill."
Detective Sergeant Siddall, of West Yorkshire Police, said: “It is unusual for us to issue an appeal like this but it is important we trace Katherina.
"I am appealing directly to Katherina or anyone who thinks they know her or knew her to get in contact.
“Likewise I am appealing to our many thousands of social media followers to help by sharing this appeal – it could help to make all the difference.”
Officers said it is quite possible Katherina may have moved out of West Yorkshire and could now be living anywhere in the country.
Call DS Siddall on 101 with information.