Research in the Philadelphia directories reveals Dickson, White & Co. existed only during the years 1837 nad 1838. The firm does not show up in the 1839 directory, where one of its partners, John Dickson, is listed as a "manufacturer" located at 572 North Third St.

(Auction 74, Exonumia Auction by Presidential Coin & Antique Company, Inc. Public Auction Sale: December 10, 2005)