BSA Parts Catalogue for 1969 Twin Cylinder Models
Re-printed coil bound copy of the factory publication, A4 page size.
Covering Frame and Engine Numbers (at start of production year)
500cc models
1969: A50 Royal Star: A50RC-101
650cc models
1969: A65 Thunderbolt: A65TC-101
A65 Lightning: A65LC-101
A65 Firebird: A65FC-101
Later 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.
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