The incident happened outside Lloyds Bank in Station Parade, Elm Park, on Saturday, October 20, at 5.30pm.
The victim was surrounded by two men, who threatened to stab him if he didn’t hand over the cash.
The first suspect is described as tanned with dark cropped hair, slim build and an East European accent.
Police have said he was wearing a a grey shell suit top and blue jeans.
Police have described the second suspect as of East European appearance with black hair.
Anyone with information should call Det Con Andy Fern on 101 or Crimestoppers on 0800 555 111.
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