The arguments in favor of the metal card were its permanence, accuracy (records could be imprinted from the embossed token), and economy (because of the imprinting capability). Still, in early June 1936, the Board decided to use a small paper card (McKinley and Frase 1970, 327 and 329). Since 1972, when SSA began assigning SSNs and issuing cards centrally from Baltimore, MD, the area number has...