Thames Valley Police is appealing for witnesses to a robbery in Milton Keynes on Monday (9/1).
At around 12.20am, a man approached the victim, a man in his twenties, outside Milton Keynes Central railway station near Subway, grabbed his shoulder and demanded his watch.
The victim ran a short distance in the direction of Sizzling Grill before falling over and dropping his watch, which the offender took before fleeing in the direction of Loughton.
The victim had grazing to his knees and hands where he fell over but did not require hospital treatment.
The offender is described as black, 5ft 10ins tall, of slim to medium build, with short, dark brown/black hair and wearing a dark blue jacket with light blue edges.
The watch is a Hagley West Chrono in silver with a blue face.
Investigating officer PC Michael Edmonds, based at Milton Keynes police station, said: “We are appealing for any witnesses to this robbery to please come forward.
“To contact us, call 101 or make a report on our website, quoting reference number 43230011371.
“Alternatively, you can provide information anonymously to independent charity Crimestoppers by calling 0800 555 111 or via its website.”