Tin found one once back around '81-2. Dunno if the BOM had lost it or they didnt bother about 'em much around the Kimberly coast at that time
This one was down near Bigge Island. Weird sensation, over water laying off big mobs of drift but smooth. I told me mates in the Kunnerwuckers FSU it was there. Never got a medal or nothin' tho.