Originally Posted by lovelyl

The FWs made up through 1936 or 1937 do not have numbers on the tension dials, later models do. I have never found this to be a problem, though. I think the main "mechanical" changes came with the white FWs. I have heard others comment that the white ones are not as good as the black ones - something about the way the belt is driven or something like that. Someone more knowledgable could tell you the difference between the black/white ones and I hope someone will jump in here with more accurate info. I just returned from a 4 day trip with 10 teenagers and I seem to having a major senior moment.... Or maybe a nervous breakdown...