These cups are an unusual variant among silver vessels of the Republican period, combining as they do Hellenistic Greek elements (the handle palmettes) with Roman traits (the form of the handles as well as the treatment of the interiors of the bowls).
Mertens, Joan R., Dr. 1992. "Recent Acquisitions, A Selection: 1991-1992." The Metropolitan Museum of Art Bulletin, 50(2): p. 11.
Metropolitan Museum of Art. 1992. "One Hundred Twenty-second Annual Report of the Trustees for the Fiscal Year July 1, 1991 through June 30, 1992." Annual Report of the Trustees of the Metropolitan Museum of Art, 122: p. 37.