Beesa ID

[classic48]

Hi all,
    Sorry to be a stranger,my wifes beesa is about finished.The neighbour though has just bought himself a Sprung Beesa project, and would like some info frame number looks like it reads YD1S3022 engine number 29841YD.Has this frame /engine combo been mixed and matched or are they matching numbers,secondly a he would like if possible some indication on the year/age of the bike.will try to get some pix up soon
                   Cheers LEITH BUTTON

[chaterlea25]

HI
BSA Bantam numbers info here
http://www.mistgreen.com/bantamref.htm

BSA Frame and engine numbers were not matching until sometime in the late 1960's

HTH
John