I have a few Waterman pens (Le Man 100, 200, Opera and an Executive), and a few (all identical) converters that are more or less original to the pens or from about the same era.
In the Opera and others the threaded converter forms a tight seal...but in one pen (the Le Man 100) the same converter is loose--to the point that it seems as though it could fall out.
As far as I was aware the Opera is just a fancier body on the same Le Man 100 base. So I don't understand why the converter would fit any differently. Any insights? and where might I be able to get Waterman converters that fit these pens perfectly these days? A few of the converters became brittle and failed so I would like to acquire a few more and have read that some of the universal replacements do not offer a perfect snug fit.