"Lazarus and Rosenfeld, importer of Bohemian glass, operated a showroom and shop in New York City during the last quarter of the nineteenth century and the first quartre of the twentieth century. They were listed as cut glass manufactureres by the American Glass Trade Directory in 1918, but we have reason to believe that they did not actually cut their own wares. At the end of WWI a brisk trade in cut glass developed with foreign factories, which was a contributing factor to the curtailment of this industry in America; the simple fact was that foreign factories could, and did, produce cut glasswares much cheaper than it was possible for American manufacturers to do."
from American Cut and Engraved Glass by Revi
That's all it says in the book.