An 1938 "RM" (Standard) class railcar at the Paihiatua Railcar Society museum, Paihiatua, New Zealand. This is RM31, "Tokomaru".

Builder: NZGR Hutt Workshops
Build date: 1938
Wheel Arrangement: A1 - 1A
Length: 20.7m
Total weight: 107 t
Top speed: 105km/h
Built: 6
Operator: New Zealand Government Railways (retired)

For some obscure reason, all railcars in New Zealand were assigned the "RM" class - which is bloody confusing as there's been at least six different models during the history of rail in New Zealand!