withdrawals and scrappings continued throughout the 1950s and 60s. the last d in vr service was the commissioner's locomotive d 639 (formerly d 658), which was replaced in this role by a y class (emd g6b) diesel electric locomotive, y 123 from january 1964, then y175 from august 1968. however, d 639 had since october 1964 taken on a new role providing motive power for the arhs 'vintage train' as the first 'special trains vintage engine', and continued in this popular role until deteriorated boiler condition saw it finally withdrawn from service in 1974.