Why Italian cruiser guns sat close together

Why were the guns in some Italian cruiser turrets mounted so close together?

The close spacing allowed both guns to use a single mechanism, which saved weight.

Some Italian cruiser turrets placed their guns unusually close together so both barrels could use a single mechanism. Sharing machinery saved weight inside the mounting. This concise answer ties the distinctive spacing to mechanical economy. It gives viewers a concrete design feature to watch for when comparing turret layouts.