GPO Graham Bell's Telephone 1876Original vintage advertising poster for the General Post Office (GPO) Graham Bells Telephone 1876 featuring a great illustration by Eric Fraser (1902 1983) of the Scottish born scientist and inventor Alexander Graham Bell (1847 1922), who is credited with inventing and patenting the first practical telephone, depicted using the telephone he invented in 1876 and making the first phone call through a wall to the next room to his assistant Thomas