The model 746 Telephone was first introduced into service in the UK in 1967. This was an improved version of the previous 1960’s 706 model. The 746 case had an integral handle which removes the need for a separate handle (as used on the earlier 706 telephones). The case styling was slightly different from the 706 although it retained the same overall look and feel. The same colour options were available that had become popular with the 706 range. The 746 was later produced with the new style plug type lead (PST and renumbered as was then known as the 8746) this was also converted to high impedance bells to work reliably on the new system of wiring.
746 Telephones produced before the mid 1980’s that do not say 8746 on the base require correct conversion and adjustment to prevent them interfering with the telephone line and potentially causing intermittent problems with both the telephone and Broadband speed/reliability.