Bubble backs are an interesting case for sure. On the one hand, they often had very interesting, art deco dials that made them quite attractive, despite the fact they were often re-finished. Unfortunately, at 32mm, they are viewed now as being too small even for women. I think that was their real death knell. Plus, and I'm sure you can weigh in on this: every watchmaker I ever knew said the movements were "evil." Can't speak to the details...
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