This mainline passenger coach was one of a series of one hundred vehicles constructed between 1914 and 1920.  Until the late 1940's they could be seen on express trains out of Euston, but after that date the vehicles were regulated to secondary work.  Withdrawal began in the early 1950s, this particular example remaining in use until April 1955.  It was then converted into a "riding and tool van" and carrying the number DM395136, was used by the Motive Power department.  Owned at Quainton by a member, having originally being purchased from British Rail by the GCR Coach Group.