Police were called after a man went into Whibleys Jewellers in West Street, Horsham, on Thursday, October 10, at 3.30pm and asked to look at a Rolex watch.
When it was brought to him by the sales assistant to look at, he grabbed it and ran out of the shop into West Street and then into South Street.
The watch is a Rolex Daytona worth several thousands pounds. The thief is described as white, of slim build, 5′ 10; with short mousey blonde hair and was wearing a navy blue zipped hooded top and dark blue jeans.
Officers carried out a search of the area but could find no trace of him. Police are appealing for witnesses to come forward. Call 101 quoting serial 0946 of 10/10 or email firstname.lastname@example.org