At 1886 there were only three cars in service. Between 1888 and 1905, another eighty cars were built or converted. The number group was 1 to 83.
Conversions came from the _AA_ and _BB_ classes in the mid to late 1890's. About 1901 some Joint Stock cars were transferred to the VR. Cars _O__ 5, 9, 12, 28, 26 and 27 became ABAB 77 - 82. The latter three cars were standard 45' dogbox cars. They are incorrectly referenced by being placed with Mansard roof car diagrams in the 1904 Diagrams Book.
In 1906, several cars were allocated to Second Class cars as BB.
In 1908, car ABAB 83 was modified to a car-van. It became ABDABD 5.
In the 1910 recoding the class was relettered to _AB_. The cars were renumbered as well.