BSA Parts List 1969, A50, A65

Information

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.