WAGR X class
Some members of the class became the Xa class due to being fitted with twin/dual air (vacuum) braking. Withdrawals of the X class started in 1973, with the X class relegated to working grain trains on the South Western mainline in their dwindling years along with serving the Fremantle to Perth section of the Eastern Railway when it reopened. In 1988 the last of the X class was withdrawn.