A man in his 50s was attacked on a redway in Bradwell Village last Thursday.
The victim was walking on the redway beside Loughton Road, near to the junction with Fosters Lane at about 11.30pm.
The man was walking from the train station and was wearing headphones, listening to music.
He was approached from behind by two men, who assaulted him, causing him to fall to the ground.
They then demanded money and jewellery from the victim.
He refused, and managed to push one of the offenders away before running to safety. No property was stolen.
The first offender is white, aged in his twenties and about 5ft 4ins tall, with a slight build and dark eyes.
He was wearing a military style jacket with side pockets, dark trousers and a military style baseball cap with side panels which were folded up.
He also had a dark scarf covering his face.
The second offender is white, about 6ft tall with a slight build.
He was wearing dark clothing and a hooded top and was stood behind the victim when the offence took place.
The victim sustained minor injuries as a result of the incident, and did not require hospital treatment.
Det Con Stephanie Mason, said: “I would like to speak to anyone who witnessed this incident, or who has any information which could help our investigation.
“I am particularly keen to speak to the driver of a dark 4x4 car which drove past the victim shortly after the incident had taken place, as they may have seen the offenders, or could have other vital information.
“Anyone with any details is asked to call the Thames Valley Police non-emergency number on 101.”