Rare… but useless

Check this out for a rare item. This would appear to be a limited slip diff for a Datsun Cherry. E10, F10 and early N10 models used this style of three bolt driveshaft flange and my money would be on this being for an E10 as it originally came from Janspeed who raced and modified E10s back in the 1970s. Sadly its missing pretty much all of its internals rendering it pretty much worthless unless you’re pretty skilled in the manufacture of one off gears! Shame…