Anne Dunwell was strangled with her own stockings
A man wearing shiny cufflinks could hold the key to unlock a 40-year-old murder case.
The body of 13-year-old Anne Dunwell was found at the foot of a manure heap just off the road between Carr and Slade Hooton, near Rotherham, in 1964.
Police say a witness has come forward reporting the sighting of a van which could have belonged to Anne's killer.
The witness reports seeing a girl on the night Anne died approach a van driven by a man wearing shiny cufflinks.
Detective Superintendent Sue Hickman said: "This new piece of information is extremely significant for us.
"It matches previous information we had about the vehicle on Cross Street and where Anne's body was found.
"There were not too many people in those days that wore cufflinks so it's very good information for us."
Anne had been sexually assaulted and strangled with her own stockings.
Following an appeal on the BBC's Crimewatch programme in March South Yorkshire Police received more than 170 calls and identified 65 new potential suspects.
These and the new lead are being followed up.