The woman was walking alone on Ashton Road on Wednesday morning at around 5:25am when she was approached from behind by two men.
One of the men held a knife towards her and demanded money, and then her bag was stolen.
Now, police have issued a photograph of two men they would like to speak to, as they may hold "vital information".
PC Daniel Burton, of GMP's Oldham district, said: "This happened early in the morning but in broad daylight, so we are sure someone must have witnessed it.
"We would like to speak to two males in the photograph as they may hold vital information.
"We are also asking for any drivers, especially taxi drivers, if they have any dashcam footage form the area at that time.
"If any members of the public have any concerns or information, they should do nothing more than call police or Crimestoppers. In an emergency, always dial 999.
"Anyone with information about this incident should contact the Oldham District Crime Team on 0161 856 8999 quoting log 437 of 15/06/2022."
Information can also be reported online or by using the LiveChat function at www.gmp.police.uk. If you can't report online, call 101 or Crimestoppers anonymously on 0800 555 111.
