An unspecified woman speaking on a clear 746F telephone, unveiled by the General Post Office (GPO), location unspecified, United Kingdom, 1968. (Photo by Peter Ruck/BIPS/Hulton Archive/Getty Images)
An unspecified woman speaking on a clear 746F telephone, unveiled by the General Post Office (GPO), location unspecified, United Kingdom, 1968. (Photo by Peter Ruck/BIPS/Hulton Archive/Getty Images)