НСБ-?

Luxurious chandelier made in the Stalinist Empire style. Manufacturing materials: brass, bronze, steel, bakelite, glass (glass or crystal - I can't judge). Since there is doubt, let it be glass. This, in my opinion, does not detract from the artistic value and historical value of this product. Unfortunately, no markings could be found. Internet searches have yielded no positive results. For the manufacturing date of the chandelier I took the year of production of one of the lampholders, which I had to repair after the purchase. I bought it a few years ago quite inexpensively, by chance, at one of the flea markets, where it, covered with a thick layer of dust, hung sadly among other "antique" things. Since then, this lamp has been decorating the interior of my living room, flooding it with bright festive rays.