Destroyer torpedo deflection sight.
Well the wreck went down in 1888. It is marked "John Starkey" And he was a brewer in Sydney, so I assume beer
Here is a link to some info on them.
aussie_time_traveller: Starkey's - one of Australia's greatest
One of the best.This from a British battleship and held to the armour plate with 18 rivets.
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a quiet wrecking day
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