I think I have had all of the 1950' series Necchi's at this point?
This one cam out of a cabinet and needed both the full "all metal bits off" cleaning as well as new wiring from plug to pedal. Fortunately I had this handy BU wiring diagram to work to.
She was frozen to the point of about a half turn only but the most fun is getting them unstuck. I made a custom crank handle out of a spare lock knob so that I can have better leverage while doing the loosening / break-in phase
No case on this one but it came with this unusual accessories box