The C.R.M. (Colqustones Racing Motors) was built by G.D. Colquhoun and D.H Stone of Catford, South London, in 1951. It was constructed to the minimum allowed weight using a space frame chassis. The coil springs were incorporated into the telescopic dampers although this was supplemented by rubber bands. Double wishbones were used on all four wheels. It was originally intended to run Norton engines but a BSA "Gold Star" was substituted due to the non availability of the Norton unit. Sadly it never achieved a great deal, partly due to the engine but also because it was against the Kiefts of Moss and Parker and numerous Cooper Mk Vs. Some respectable results were achieved by CA Streets and later Bill Jones. Arthur Mallock also attempted to race a CRM during 1952.

This is how it was reviewed in Iota.