Those hook-shaped pass-through attachment fixtures look like those on lamps I've seen attributed to Sarfatti for Arteluce/Arredoluce.
But this lamp sold on 1st Dibs, and the dealer made no mention of a maker; seems strange a 1st Dibs seller wouldn't try to attribute it if they had even the slightest reason to believe.. 
I think you're right Jesgord
Looking more closely, the hook-shaped connectors on Arredoluce lamps, the hook looks like flat steel, and points upward. This lamp the hook shaped connectors are tubular steel and point downward..
And I hadn't noticed the connectors on the back of the globes. Those don't look like they'd belong on an Arredoluce lamp.
Thanks!
Not Arredoluce
Floor lamps like this with the connectors how they are applied to the stem are common in auctions - and go for about $50-100.
I like Robert Sonneman an awful lot so I am always scouting the chrome ball lamps etc at auctions and I have seen this style of lamp come up often.
- A.S.
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