The single QSA class sleeper wagon (16200) was converted from an AD class coach underframe in 1967. It was fitted with RA type wagon bogies unlike the QS class conversions, which retained their original bogies. It was written off in 1975.

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The WAGR outline diagram is shown below.

Other Sleeper wagons The W.A.G.R.'s other sleepers were class NA, and the bogie vehicles in Classes QCS, QPS, QRS, and QS.