Leaving aside the basic point that a three piece case can’t be stronger than a two piece design since it has an extra joint to protect - along with an exhibition case back - I would have to say that incredibly, in over 40 years of watch ownership, I’ve never yet had a problem with damaging the movement within a conventional case design. So, for me, it solved a problem that didn’t exist.
Perhaps if I were to spend more time ejecting from aircraft on MB ejector seats I’d get more value - that is if I were willing to wear a watch of that price whilst trialling MB products!
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