Hi All,
Aargh, Columbia chainwheels again. Please believe me, I really do have other interests in life... (-:
The pictures of ladies bikes on Mr. Columbia's catalogue show two different styles of chainwheel. In the top photo the cutouts are angular,with five arms and smaller triangular cutouts in the spandrels, and in the bottom photo it has four arms, with kidney shaped cutouts, the same as the men's bicycle.
Bozman's bike, with the earlier frame number has the five arm angular chainwheel, which seems to be the same as that used on the ladies military bicycle (M306), which would make sense if still using up old WW2 stock.
Barkeep's bike has a later frame number, and uses the four arm kidney chainwheel, which seems to have been standardised between the men's and ladies bikes at some point, maybe when they ran out of the earlier chainwheels?
Best Regards,
Adrian