The elderly man was walking his dog on a footpath which runs parallel with a train line from Carlton Road in Worksop, when he was approached by a tattooed man, who is believed to be 25 to 30-years-old and around 5ft 9 to 5ft 10 inches tall.
He pushed the victim up against a fence post, before demanding his phone and money at around 10 to 11.30am on September 24.
The elderly man was sworn at by the attacker who had black swirl tattoos on the sides of his head, after he refused to hand over the items.
The victim then defended himself with the offender leaving the scene empty handed.
Nottinghamshire police are now appealing for witnesses who saw the attack to come forward.
Detective Constable Lisa Porter said: “This must have been a terrifying experience for the victim.
"Thankfully no one was injured and we’d like to thank the victim for coming forward and reporting the crime to us.
“We are now appealing for any witnesses or anyone with any information that can help with our enquiries.
“The incident happened around 10-11.30am on 24 September on a footpath which runs parallel with a train line from Carlton Road in Worksop, which leads to Queensway.
“The man has been described as white, around 25-30yrs, 5’9 – 5’10 tall, medium build with shaved hair at the sides with black swirl tattoos on the sides of his head above his ears.
“Please call 101, quoting incident number 293 of 24 September 2020.”