Originally Posted by
bobward
I seem to remember something in a spotting magazine saying that the code was related to the airframe number or build number?
That would probably only be in cases such as in the Typhoon fleet, where the 3 numbers of the reg are used as the tail code, ie. ZK357 is coded 357. I remember as a youngster seeing Phantoms with codes such as 3**, and thinking the RAF had at least 300 Phantoms in service.
