A man was threatened with a six inch knife and chased down before having his watch stolen in Westminster - prompting police to release CCTV footage of two men they would like to speak to.
Met police were called to Great Cumberland Place at around 2.50pm on July 20 to reports of a robbery.
A 42-year-old man was approached by a man who made repeated demands for his £19,000 Audemars Piguet watch, at around 2.30pm as he passed Upper Berkeley Street.
The victim refused and was then threatened with a six-inch kitchen knife before he began to run away, noticing a second man chasing him.
As the victim ran away he fell to the ground and the two men forced the watch off his wrist, possibly cutting it with the knife.
He suffered cuts and swelling to the side of his face.
Officers have released CCTV footage of two men they would like to speak to following the incident.
The first suspect in black, believed to be in his late teens, around 5ft 7inches tall and of skinny build.
He was wearing a blue t-shirt and grey tracksuit bottoms.
The second suspect is believed to be of Middle Eastern or Mediterranean appearance and in his early 20s.
CCTV footage shows he was topless at the time with a t-shirt over his head, grey tracksuit bottoms and blue trainers.
Police are keen to hear from anyone who may recognise the two men shown on CCTV or who witnessed the incident.
There have been no arrests and enquiries continue.
Anyone with any information is asked to contact Westminster Police on 101 or get in touch with Crimestoppers anonymously by calling 0800 555 111, or visiting crimestoppers-uk.org.