Helmets only ever seemed to be used at bases and FOB's for Stand To or for IDF, never really seen them worn much elsewhere by Aussies and Kiwi's in Vietnam.My second thought was that sneaky seppo bastard had stolen an L1A1!
I wore that same helmet through to 97 when I got posted from 8/9 to 6RAR. ODF units up in Townsville had the new kevlar helmets at least as early as 93 in Somalia.