GPO 312L telephone Designer (Person) Heiberg, Jean Bjerknes, Johan Christian Designer (Organisation) Ericsson GPO Manufacturer Siemens Manufactured for GPO Date 1954
GPO pyramid telephone 162 Designer (Organisation) Siemens GPO Manufacturer Siemens Manufactured for GPO Date 1932
Trimphone telephone Designer (Person) Rowlands, Martyn Manufacturer STC Manufactured for GPO Date 1966 (circa)
Brown Trimphone telephone Designer (Person) Rowlands, Martyn Manufacturer STC Manufactured for GPO Date 1966 (circa)
Deltaphone telephone Designer (Person) Rowlands, Martyn Manufacturer STC Manufactured for GPO Date 1966 (circa)
Cream Trimphone telephone Designer (Person) Rowlands, Martyn Manufacturer STC Manufactured for GPO Date 1966