Post Office 706 telephone, c 1959.
© Science Museum / Science & Society Picture Library
This telephone belongs to the 700 series produced by the British Post Office. This series was an updated version of the earlier 300 series with an improved transmision circuit and a new handset. Then, in 1959 a new plastic case was produced and the improved design became known as the 706 or 'Modern' Telephone. The 706 was available in a variety of colours including black, grey, green, yellow, red and blue as well as the ivory shown, giving the consumer more choice. Photographed with plastic case removed.