Hello
I found a lot of old electrical stuff and put it on ebay in lots. There's one Bejamin cluster, dated 3-3-1903 as the patent, which is a two socket. Mine is has seen a good bit of wear on the brass, but a really beautiful one sold on ebay recently, check it out in completed auctions. Inside it's very very bright gold colored, so I know that was the way it looked on the outside when it was new.
I think most of the stuff is a little later than this group collects, nothing is pre-1900. Obviously someone had once cared about saving the stuff, but when I found it it was all curbside and heading for the dump. That seemed like such a waste.
There are four auctions and the easiest way to find them is to search by seller, THERUNAWAYBUNNIE.
the auction numbers are 150052868050 150052868515 150052868519 150052868510