At the meeting of the Numismatic Society of South Australia held on 16 February 2017 a member showed the above WW1 AIF Identity Disk made from a skimmed Queen Victoria Penny. Holed and engraved on the reverse “2973 E.J. STANLEY 7TH. 57TH. A.I.F. R.C.”. Made out to Edmund John (or Joe) Stanley, born circa 1890 and in either Victoria or NSW. He enlisted in 1916 and shipped to France where he was taken on strength of the 57th Battalion. You can read a comprehensive article about this disk and the man behind it here.