Before the movie came along and when I was knee high to a grasshopper I am pretty sure there was one on display at the Australianicon War Museum in Canberra. Now I would have only been about nine or so, but I do recall a display on all the gadgets the Aussies had designed on the battlefield in WW1 and I am pretty sure I saw one there with a note saying what it was used for and why the did it and that was they wouldn't issue pistols to no officers and especially an Aussie grunt. Now how true that was I don't know. Now I could be wrong and my wife tells me that I am often wrong a lot. Now if it wasn't there it might have been in a mining museum I have visited.