The man said he was approached by two women at the Cattle Market garage sale on Sunday July 18 around 11 a.m.
The couple had claimed to be charity collectors before engaging with the man and touching his arms and body. He later realized that his watch, estimated to be worth around £ 10,000, was missing.
The first suspect is described as a tanned white female, about 22 years old, 5’8 “tall and wearing a light blue coat. The second is a tanned white female, about a similar age and 5’6”.
Police urge members of the public to be vigilant as detectives continue to investigate reports of similar incidents in the West Sussex area.
Detective Sergeant Vicky Guy said: “We understand that such reports can cause concern to local communities and we are investigating these incidents as a matter of priority.
“Please be vigilant if strangers try to distract you and report any suspicious behavior to us so that we can take action. “
Anyone who may have seen two women with clipboards, has dash cam footage of an incident or information that could assist with the investigation, is asked to report it to police online or calling 101, citing Operation Overdrive.