the driver can then move the master controller back to 'full series'. The traction switchgear will remain in 'full parallel' unless the driver moves the master controller from 'full series' to any position towards 'off'. Many drivers took advantage of this feature because it was more comfortable maintaining the downward pressure on the deadman's handle with the handle at the 6 o'clock position (the 'full series' position) rather than the 9 o'clock position (the 'full parallel' position). 58 trailers In 1938, fifty-eight 'Standard Stock' trailers, originally built in 1927, were converted to operate with the 1938 Stock. These cars were renumbered 70513–70570. The first car withdrawn was 70550, as a result of damage sustained in an accident at Watford Junction in 1962, and the last car, 70534, was withdrawn in 1973. Isle of Wight In 1988, ten sets of 1938 stock were bought by Network SouthEast for use on the Island Line service on the Isle of Wight, and were allocated two-car TOPS Class 483. These units were heavily rebuilt and introduced between 1989 and 1992 to replace the even older Class 485 and 486 trains that had been running on the line since 1967, also constructed from ex-Tube stock. Four sets have been scrapped and the other six have been withdrawn, with the final service running on the 3 January 2021. As of January 2021, on withdrawal, the Class 483s were the oldest stock in mainline usage in the United Kingdom, aged 82 years. The units were leased from HSBC Rail until South West Trains bought them outright in May 2007. After running many years in Network SouthEast (NSE) colours, the trains were repainted into a Dinosaur themed livery to celebrate the Isle of Wight's rich palaeontological history. However, due to customer dissatisfaction, all trains returned to an approximation of their original LT train red livery; albeit with yellow fronts, as per mainline regulations in 2008. In early-2018, the units had the Island Line sign and the South Western Railway logo. In 2019, South Western Railway announced that as part of a £26m programme of improvements to the Island Line, the Class 483s were finally due to be replaced, following a spate of severe service interruptions from technical faults arising in the 81-year-old stock. The Vivarail D-Train, converted from London Underground D78 Stock, was selected as the successor to the Class 483s; five two-car EMU units are to be