Production of the new telephone commenced in 1965 by STC, and an initial quantity of 1000 was offered to customers on a selective trial basis in the London North West Telephone Area in the same year. It became available throughout the country in 1968, at extra rental cost, with a choice of three two-tone colour schemes: grey-white, grey-green and two-tone blue.
In 1965, STC started manufacturing the new telephone, offering an initial quantity of 1000 units on a selective trial basis in the London North West Telephone Area. By 1968, this model became available throughout the country at an extra rental cost and featured three two-tone color options: grey-white, grey-green, and two-tone blue.