Fifteen vans were built 1913/194 with clerestory roof outlines. These were CW 1 - 15.
An additional five vans were built 1935, numbered 16 - 20. These last vans were built with the arched roof style introduced in the 1920's.
File c172m compiled by Peter J. Vincent, updated 31/7/2007, checked 16/2/2026