Police are appealing for witnesses to a burglary in Bromsgrove, in which the distinctive-dressed offender was chased.
It happened at a house in New Road yesterday morning, Thursday 27th September.
The offender had got into the rear garden and smashed a conservatory door.
At around 12.30pm, a local resident saw him leaving the property and gave chase, but he made off into the rear garden of a home in Fairmount Road.
Officers carried out a search of the area, which included the use of dog handlers and the force helicopter, but the man was not located.
The man is described as white, 6ft tall, in his 20s, with a pale complexion, wearing a dark green trilby hat, green tweed jacket, black skinny jeans, and black plimsolls, and carrying a green shoulder satchel-type bag.
Detective Constable Jim Guinivan of West Mercia Police said: "As the man was very distinctively dressed, we hope someone may have seen him or recognise the description."
It is believed jewellery was stolen but officers are still trying to establish the details.
Witnesses or anyone with information are asked to contact Det Con Guinivan on the non-emergency number 101 quoting incident 285-s-270912, or ring the independent charity Crimestoppers anonymously on 0800 555111.
Last week West Mercia Police launched Citadel, a new initiative aimed at driving down the number of burglaries committed in the force area. Burglary of people's homes and catching offenders is a high priority for the force.
Crime prevention information is available on the force website, www.westmercia.police.uk