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BSA Models up to 1920

 

1912

       

Model

Engine prefix

Engine sequence

Frame prefix

Frame sequence

CC

3.5 H.P. 2 SPEED   5530   5351 500
4.25 H.P. 3 SPEED   5530   5351 550
         

1914

       

Model

Engine prefix

Engine sequence

Frame prefix

Frame sequence

CC

3.5 H.P. 2 SPEED   8662   8801 500
4.25 H.P. 3 SPEED   5530   5351 550
         

1915

       

Model

Engine prefix

Engine sequence

Frame prefix

Frame sequence

CC

4.25 H.P. CHAIN CUM BELT 3 SPEED   12692   12661 550
         

1916

       

Model

Engine prefix

Engine sequence

Frame prefix

Frame sequence

CC

4.25 H.P. CHAIN CUM BELT 3 SPEED   17575   17461 550
         

1917

       

Model

Engine prefix

Engine sequence

Frame prefix

Frame sequence

CC

4.25 H.P. CHAIN CUM BELT 3 SPEED   22867   22871 550
         

1918

       

Model

Engine prefix

Engine sequence

Frame prefix

Frame sequence

CC

4.25 H.P. CHAIN CUM BELT 3 SPEED   26991   27071 550
         

1919

       

Model

Engine prefix

Engine sequence

Frame prefix

Frame sequence

CC

4.25 H.P. CHAIN CUM BELT 3 SPEED   31213   31351 550
         

1920

       

Model

Engine prefix

Engine sequence

Frame prefix

Frame sequence

CC

4.25 H.P. CHAIN CUM BELT 3 SPEED   36965   37901 550
6/7 H.P. TWIN   100 T 100 770
         
Ā© BSAOC 1997, 1998, 1999, 2000. All rights reserved.

Pre 1929 markings are based on listings available to the Club but do NOT have any form of cross referencing, therefore there is no way of checking their accuracy. Post 1929, the listing are cross referenced by the despatch books and by contemporary listings in parts books and dealer service sheets, where available. This cross referencing is available for most models up to the closure of the factory. However we are currently revising the pre 1929 lists which we are cross referencing with machine which we have personally scrutinised and verified. We need your assistance to help us on this and request that anybody who has pre 1929 BSA bikes write to the machine dating officer Brian Pollitt (address below) with details of your machine and photos of the complete bike plus detailed photos of the engine. All photos will be returned.

BSAOC pre1929 Machine Dating.

Brian Pollitt

16 Dane Avenue

Ā Partington

Manchester

M31 4GB