It was always something at the Columbia Silver Company.
I found some silver collectors discussing (at an internet message forum) my father's long gone business. I am one of the daughters of one of the brothers who owned Columbia Silver Company. The silver company was located in Brooklyn on MacDonald Avenue. It went completely out of business in the 70s. No records remain. By 1994, all the three brothers had passed away. A photo of the three brothers, from 1916, can be found at this blog in the family photo of the side from Minsk.