WWI era double-sided pendant locket featuring an Australian soldier

World War One era double-sided, circular pendant locket containing the portraits of the head and shoulders of an Australian soldier on one side and a young woman on the other.
The soldier is dressed in uniform, with the rising sun collar badges visible on the lapels.
The surrounds of the pendant comprise five gold ivy leaves on semicircular pieces of gold wire which attach to the edge of the locket with gold balls.
Between the leaves are two blue stones and a single white pearl held by gold claws. There would have been a second pearl, but this has been lost. The brooch was in pieces when acquired and has been repaired by a jeweller.
There is a gold spherical fixture at the top which has an affixed loop through which a chain could be threaded.
The young woman on the reverse is formally dressed and has her hair pulled under her broad brimmed hat, held in place by a hat pin. The hat is decorated with a flower and leaves. There is lace detail on her white collar. Her dress appears to be of darker material with white polka dots
The circular gold surrounds hold the portraits in place. A thin piece of glass covers each photograph.
There are no hallmarks or maker's marks.