Incomplete light fitting.

[GBDamo]

My client has bought these 'antique' lights, stop sniggering at the back, but they are incomplete.

Anyone know what the missing part is and if they can be bought separately?
[automerge]1599753322[/automerge]
Is this the kind of thing that's needed?

 

[snowhead]

Have you never watched Fools and Horses.
That's the bolt that Grandad shouldn't have knocked out.

Alternately,
My guess would be it had an hexagonal brass rose to cover the rod with the nut on which went through a steel bracket screwed to the ceiling, joist or noggin not plasterboard.

 

[buzzlightyear]

This time next year you will ba a million hair. there is a lot of bass in then. Lol