[citation][nom]Stardude82[/nom]I imagine a good jeweler/watch repair technician could find sapphire crystals for most watches. They aren't ridiculously expensive either.[/citation]
Yes, you can put a Sapphire Crystal in any watch, but they aren't anything like as cheap as a standard mineral.
[citation][nom]wotan31[/nom]That's just it - a quality automatic mechanical watch like a Rolex or an Omega will run literally for decades, without winding, without batteries, without maintenance. They are far more rugged and reliable than any electronic watch, which is why they are worn in the most harsh environments on earth (and space). The first person (actually it was a 2-man team) to climb Mt. Everest were wearing Rolexes. The deepest human dive record in the world, is around 1700 feet below sea level, and you guessed it, a Rolex Sea Dweller. These premium automatic mechanical watches are jewelry and status symbols for office workers and desk jockeys - but the reason they are so expensive is they are designed and built for the harshest environments imaginable.[/citation]
Sorry mate, but some of this is inaccurate. Much like any mechanical automatic watch in fact. Even your average Rolex is +/- 2-3 mins a day - nowhere near as accurate as even the cheapest quartz watch. Plus, the wear and tear on mechanical parts under constant pressure means that you should really service a mechanical watch every three years or so (£300-£700 for anyone interested in a Rolex, unless you find a good external repairer and even then, parts are required from Rolex at a premium), so they do need extensive maintenance. They are nowhere near as durable as most quartz watches either, especially when you consider a brand like G-Shock (however it does depend on your environment).
Mechanical watches are an outstanding feat of engineering but if you want an accurate and durable watch stick to quartz.