It's a crap shoot on vintage. I bought brand new gen 580's for my 1675 and because of the wear/polish on the lugs they do not fit as good as a pair of old beat up 501's. The old 55's on an old Swiss jubilee fit the best on that particular case. So so fit with new 580 Better fit with old 55's Once MY restored my 7206 it fits my 5513 perfect, but that case is still pretty thick for a 50 year old watch. With modded cases it can even be more difficult and takes some sanding and bending to get a good fit. MBW case and Bracelet after some work