Pennsylvania--Philadelphia. Undated (1868) Key & Co. Rulau Pa-Ph A175A. Copper. Plain Edge. MS-63 RB (NGC). 28.1 mm. Unlisted in this metallic composition in the 2004 edition of the Rulau reference on U.S. tokens. From the Robert Adam Collection of Tokens and Medals. Acquired from Stephen L. Tanenbaum, March 1996 National Exonumia Convention.