There is a confusing mass of these Bedford CA fire vans, but I think I've got my head round it. There are three 'Fire Engines'. The green one (405) is the original casting (split screen, smooth roof) without a friction motor. This is a contemporary of 405 in red with 'Fire Dept' logos (405M) which is the same casting with a friction motor. No 423 is the later casting (one piece windscreen & moulded roof) in red with 'Fire Dept' logos and no friction motor.

The mechanical flywheel friction motor version , 405M, was released in 1956 and remained in the range until 1959. It was only available in red, the ladder being silver or black. Like all these early models it is sought after and will never be cheap.