Picture of a man in a white T-shirt and sunglasses could hold the key to solving the mysterious disappearance of Revelle Balmain 26 years ago - after a Daily Mail Australia investigation put the case back in the spotlight

Police have released a photo of a man they want to speak to about the disappearance of Revelle Balmain, a young Sydney woman who has been missing for 26 years.

Police are hoping a photo of a man sent to them anonymously could provide the key to finding out what happened to Sydney woman Revelle Balmain, who disappeared more than 26 years ago.

Ms Balmain was 22 when she was last seen in the Kingsford area in the city's east on November 5, 1994.

An image of an unknown man who could help solve the 26-year old mystery disappearance has been released by police

Her make-up bag, keys and a shoe were later found scattered in the same suburb near Ainslie Street.

Ms Balmain was reported missing and has not been seen or heard from since and no one has been charged over her disappearance.

A coronial inquest in 1999 found she had died at the hands of a person or persons unknown and the matter was referred to the NSW Police Unsolved Homicide Unit for future investigation.

Revelle Balmain was 22 years old when she disappeared without a trace in November 1994.

 Last year, a formal review of the cold case began.

In May, a $1 million reward was announced by the NSW government as part of a new appeal for someone to come forward with information that may help police find out what happened to her.

Police have now released an image of a man they wish to identify, who may have information about Ms Balmain's last known movements.

Strike Force Aramac lead investigator Detective Chief Inspector Stuart Bell said the image was sent to investigators anonymously after the reward was announced.

The cold case file to solve the disappearance of missing woman Revelle Balmain began in earnest in 2020 with a $1 million dollar reward offered for anyone with information

'It is believed that this image was taken some time in the mid-2000s, but that the individual depicted may have information that would help us progress our investigation,' Det Ch Insp Bell said.

'As always, we continue to encourage anyone in the public that may have information about Revelle's disappearance to come forward and speak with police, so that we may finally provide answers to her family.'