This advertisement for the Sonn Brothers, Import & Export Co. appeared in the journal, Commercial America, vol. 19, Philadelphia, July, 1922, p. 22. The ad says “Founded 1873.” Actually, the first entry I found for Sonn Brothers in New York city directories was an 1875 entry reading, “Sonn Brothers, fish, 119 Warren.” The brothers were Henry Sonn and Hyman Sonn, both living at 547 2nd St. Shortly after this, in Goulding’s New York City Directory, 1876-77, the Sonn brothers were grocers, located at 181 Reade St., and then in Trow, 1878, they were grocers located at 83 North Moore St. – Walter Grutchfield (read more about this at his website)