The Q-class was a class of 24 trams built by the

Melbourne & Metropolitan Tramways Board The Melbourne & Metropolitan Tramways Board (MMTB) was a government-owned authority that was responsible for the tram network in Melbourne, Australia between 1919 and 1983, when it was merged into the Metropolitan Transit Authority. It had be ...

(MMTB). They were built as part of the MMTB's plan to quickly increase the size of its fleet at its Holden Street Workshops. Twenty were rebuilt for use on all night services and in this role they travelled across the network.M&MTB Q No 199
Tramway Museum Society of Victoria

References

{{MelbourneTramNavbox, state=collapsed Melbourne tram vehicles 600 V DC multiple units