Three masked burglars made off with jewellery and a Land Rover after breaking into a house in Dobcross and assaulting the male occupant with a baseball bat.
It happened last Saturday evening (19 December) at around 9pm on Wool Road.
The men broke into the property before threatening and assaulting the occupant with the weapon, whilst demanding money.
The victim sustained head, arm and torso injuries.
The men, wearing dark-coloured clothing and masks, escaped with jewellery including high-value watches and the keys to a Land Rover Discovery, which was subsequently stolen from the driveway.
Police are appealing for witnesses to come forward.
DC Kavita Young, of GMP's Oldham district, said: "Luckily, the victim wasn't more seriously injured. Nevertheless, this was a traumatic experience for him.
"An investigation is underway and I would like to ask anyone with information which may assist us with our enquiries to contact us or Crimestoppers, anonymously."
Anyone with information should contact police on 0161 856 8905, quoting 2748 19/12/20 or the independent charity Crimestoppers, anonymously, on 0800 555 111.