A system which is cited as being the forerunner of the modern mobile phone, was first launched from the Peterloo telephone exchange in Manchester in 1959. Initially called the 'Post Office South Lancashire Radiophone Service', it was inaugurated on 28 October and along with South Lancs also covered North Cheshire and parts of The Wirral. The signals were operated through two antennas (one on Liverpool's Lancaster House, and the other at Horwich on Winter Hill, with an in-fill for the City Centre on Manchester's Telephone House.). A map coverage map was published in the 1960 Post Office Engineers Journal (pictured) along with detailed technical specifications of the system.