As some of you may know (I've received great help after my previous thread) I'm in the process of designing and manufacturing a watch. As Chinese New Year is coming to and end, I'll soon be ordering prototypes. Before doing so, there are a couple of questions I'd like to know whether anyone here has any experience with previously:
- Case coating/ plating: What's really the difference between coating techniques, e.g. PVD vs. IPG vs. DLC, in terms of cost, quality, durability?
- Mineral vs. sapphire glass on the case back: what are the risks of using mineral glass instead of sapphire glass for the case back? I mean, I guess the risk for scratches is less - at what kind of price level would you expect sapphire on the case back?
- Screw vs. "common" crown: Unless you're going for a high water resistance, is there any point in having a screw-down crown? Doesn't that just make winding the watch more cumbersome?
- "Movement holder": First of all - what is this? :) Second of all, what are the advantages and disadvantages of having a plastic vs. copper movement holder (except for price and weight)?
Very grateful for any help on the above topics! :)