What's the most expensive metal you're ever likely to see in a watch? Contrary to popular perceptions, it isn't platimum. This metal is so expensive that its often used to coat other precious metals, as in the example above.
It's also a metal that appears frequently on vintage Omega Constellations: mainly on hands and markers.
What is it? Click here for the answer - a nice little riff on the topic by Susan Dorling