The photo provided by Der Spiegel looks clear enough to me: old (genuine) cup, new (fake) inscription.
Peter Green -- Peter Green, F.R.S.L. Dougherty Centennial Professor Emeritus of Classics The University of Texas at Austin; Adjunct Professor of Classics and Editor, Syllecta Classica, 404 Jefferson Building, The University of Iowa, Iowa City, IA 52242-1418, [EMAIL PROTECTED] Home: 1268 Chamberlain Drive, Iowa City, IA 52240-2922, tel.: 319-341-9805/6573, fax 319-335-3884.
