Looks a bit like a VL carbied distributor?

VN is different again as it has a two pin (two versions, one rectangular - the other more oval) connector on the side.

The box you have is the module. Carry a spare as they are well known for leaving cars stranded, or maybe a better idea, use that dizzy to operate a 6AL MSD or similar... Mega reliable set-up.

Regards,

Dave.