Detectives are appealing for witnesses after armed robbers threatened to shoot a woman at a post office in Denshaw on Wednesday 23 May 2007.
At about 10.20am, three masked men, armed with an axe, a large knife and a handgun, ran into the shop on Delph Road. The sub postmistress ran out the back behind a door, but the men managed to grab her and demanded money.
One of the men ran to the front door, while the other two ran behind the counter and took money and other items, before running out of the shop.
The men are believed to have escaped in a new style blue Fiat Panda, which they are thought to have arrived in.
The car, which had been reported stolen from the Rochdale area earlier this month, was later found abandoned nearby on Dumfries Avenue.
A small silver or beige vehicle was also seen in the Dumfries Avenue area at the time the car was abandoned and detectives are keen to speak to anyone who may have seen it or who has any information about it.
The woman was not physically injured but has been left extremely terrified by what has happened.
All three men are described as white and as having an extremely smart appearance. They were all wearing balaclavas.
One of the men was aged in his mid 20s, 5ft 8 to 5ft 10in tall and of medium build. He wore a smart black three-quarter length coat that was unfastened and made from a shower proof material.
The second man is also believed to be aged in his mid 20s, 5f 8in to 5ft 10in tall but of slim build. He wore almost identical clothing.
The third man, who stood by the front door, was described as being shorter at 5ft 7in to 5ft 8in and of being of a larger build.
Detective Constable John Coleman from Oldham CID said: "The sub post mistress is absolutely terrified following the incident this morning and what these dangerous men put her through.
"The car that we believe may have been used in the robbery has been found in the Dumfries Avenue area of Denshaw and I'd ask local residents or anyone who was in that area at the time and who may have seen the car or the offenders to contact us.
"Similarly, if anyone saw the incident at the post office or has any information about what happened, then I'd ask them to get in touch."
Anyone with any information should contact Oldham CID on 0161 856 8951 or Crimestoppers anonymously on 0800 555 111.