A purple indelible ink cross, the image is of AIF solders WW1. Two marks on the reverse 5/1015 & #5 -?
"The Camp, 27th July 1909. Dear Frank, I hope you are still enjoying yourself in this country. The one with the (X) is our Col. & the other is the adjutant. I am not in this one as I was away on duty. John Davie".
9th Royal Scotts marching out Aberdour 1909.