D Vans
These four-wheelers were the first Guard's Vans built for the Victorian Railways. They were built nearly continuously, from 1858 to 1891. The code 'D' was applied on a van, as late as 1907.
These vans were attached at the rear of trains. As there was no continuous brake, the guard at the rear assisted stopping by using the handbrake.
When construction of the 'D' vans stopped, the number group was from 1D to 265D. However, there were far more vans that this in total, because many of the earlier vans had been scrapped and replaced by new vans which took the same numbers.
In the 1890s some vans were rebuilt from four to six wheels.
Read more about this topic: Victorian Railways Z Vans