There are a handful of watches that get referenced more than they get worn, pieces that live mostly in headlines and auction results. The Omega Speedmaster isn't one of them....

The first thing to note about the Tank à Guichets is what's been taken away. The dial is gone. The hands are gone. The Cartier signature is gone, crowded off...

There's a moment, familiar to most collectors, when a watch stops being an object and starts being something else. It's not when you first see it in a photograph, or...