Seeking help in the dating of this photo. My Dad said it was his mother Violet Young who was born in 1887 and married in 1908, it's possible that the photo was taken for her husband during WW1.
The other alternative is that it is Violet's mother Florence who was born in 1861, she lived in Sydney Australia from mid 1880's prior to that she was in Queensland from 1864.

I just had a look at the original photo it was taken by Tesla Studios, Q.V. Markets, George St. Sydney