Historical information
These are WW1 Australian soldiers, They have leather bandoliers, leather leggings and spurs. Most have slouch hats. Therefore they are probably drivers. The big officer in the middle has red tabs so it is assumed he would be Colonel or above. Seated on the ground, right side is a veteran. He has a colour patch with the letter "A" . There is a Lance Corporal with a colour patch. I would place this as c1916-1918.
Physical description
This is a small group portrait set into a cardboard frame. The photo is black and white. There are 3 ranks of soldiers in front of a timber weatherboard building.
Inscriptions & markings
On the back written in texta is Mrs O. Pell.