Another surprise arrived in the mail today

Today I received the Long Service and Good Conduct (Military) Medal with clasp Australia. It is the first one I've come across and this one was awarded to 1699 WOII Robert Balfour Anderson. Anderson was in the Australian Instructional Corps. He was given permission to serve in the AIF in 1918 and enlisted as 60636 SGT R.B. Anderson 7 Bn, AIF. I'm not sure what happened in the inter war years however, during WWII he again enlisted, this time as VX10141 WOI R.B. Anderson . The only lead I have is that he enlisted for WWI in Ararat in Victoria. I have a reference that indicates that only 288 of these medals were issued. Also in package was Anderson's BWM.