BSA Parts Catalogue for 1969 to 1971 Bantam 175 Model
Re-printed coil bound copy of the factory publication, A4 page size.
Covering Frame and Engine Numbers (at start of production year)
1969: Bantam 175: D175-
In 1969 a new numbering system was introduced using a two letter prefix for the month and model season year.
The first letter designates months as follows:
A: January B: February C: March D: April E: May G: June H: July
J: August K: September N: October P: November X: December
The second letter is the year code:
C: July 1968 to July 1969 for bikes made for 1969 selling season.
Numbering started at 00101 and carried across all models.