
The character began at the start of the alphabet, and indicated year of manufacture. Reynolds 531) frames, and involved the placing of a character at the beginning of the serial number. This new system applied to the high-end (i.e. Yet another number system was introduced in 1966. Note: Some of the mid-60's straight guage 531 frames had serial numbers starting with a single letter which was towards the end of the alphabet.

(Info from the Nottinghamshire Archives).

RALEIGH SERIAL NUMBER DATES: After the war, Raleigh began adding letters after the running number series which restarted when a new letter was used.
