The weather was clement so the boys went out on the lawn.
'Tourby' is the manufacturer, and it's an 'Aviator' model. I hadn't heard of the manufacturer until the competition but from their website they appear to be a newish company (?) They also make more decorative designs and custom watches.
They're a site sponsor so I think it's OK to post this link (Mods, please remove if inappropriate)
I assumed it was just a retro style pilot design but from reading up around the wider parts of WUS (which never fails to inform does it?) I now appreciate it's based on a classic German design that seems to be a bit of a design icon. Still learning . . .
The screws that come from ETA are nickel plated steel. The nickel plating is designed to keep them from rusting. when the nickel plating is polished off and the screws are heated the steel will turn blue. In this sense, the blue is merely for decoration. The bluing effect does provide corrosion resistance though, and is the original reason watch screws used to be blued. So to answer his question, they are only blue where the plating is removed and probably on the top surface of the screw head.They're proper screws and they're blue but I don't know if they're blue all the way through or if they're surface painted/coated. The slot appears 'normal' colour so some sort of surface decoration seems likely I suppose.