it's non ferrous but too heavy to be aluminium. I can't seem to find anything related to the text on it. I dug it out of a field near Canberra Australia. I'm assuming it's a stamp of some sort but have no further knowledge than that. I have attached several photos including a flipped copy and a 30x picture of some lettering and where I scored it with my shovel pulling it out of the ground. I'm fascinated in this find and hopefully someone out there can give me some insight into what this is.
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