My dad found this one near Old Halls Creek in 1983 while metal detecting for gold. He took it home to Victoria and it's been hanging up on his workshop wall ever since.
He passed away in 2016, and we've decided it should be returned to its place of origin, or as best we can, so we're handing it over to the WA Museum next week. It's about 60 cm long, very weathered and quite fragile. They think it's about 150 years old.