GPO 312L telephone Designer (Person) Heiberg, Jean Bjerknes, Johan Christian Designer (Organisation) Ericsson GPO Manufacturer Siemens Manufactured for GPO Date 1954
Ericofon telephone - old case model Designer (Person) Blomberg, Hugo Lysell, Ralph Thames, Gosta Designer (Organisation) Ericsson Manufacturer Ericsson Date 1956
Ericofon telephone - new case model Designer (Person) Blomberg, Hugo Lysell, Ralph Thames, Gosta Designer (Organisation) Ericsson Manufacturer Ericsson Date 1964 - 1984