While the case may have this sort of seamless, transparent look to it, the construction is extremely complex. There are 12 separate sapphire components that can take up to 510 hours of machining and polishing to create. And that doesn't even begin to take into account the breakage that can occur – these pieces are prone to shattering if not machined just-so, and if a component breaks it can mean dozens or hundreds of wasted hours. There are titanium reinforcing components, and the tourbillon still has that retractable dome than can be deployed over the top too. To me, this case is the perfect fit for something as mechanically interesting as the HM6, since you can now watch every tiny little piece at work.