How to use · October 2026 · 7 min
Diameter tells you how big the dial looks. Lug-to-lug tells you whether the watch fits. How to measure both, and the rule of thumb that gets it right.
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How to use
What the rotating bezel is for, how to set it in two seconds, why it only turns one way, and the three jobs it does on dry land: timing, ...
Making
Sellita's SW200 and SW300 are built to the same designs as ETA's 2824 and 2892. What actually differs, where La Joux-Perret fits in, and ...
Which Wren
Titanium is about 40% lighter and nickel free. Steel is heavier and easier to polish. What actually changes on the wrist, why we switched...
Making
What the pigment codes and grades on a lume spec actually mean, why white lume glows brightest and colored lume costs you some, and why e...
How to use
The number on the dial is a lab result, not a depth. What the test involves, what 30, 50, 100 and 200 meters are good for, what actually ...
Making
Steel is soft, which is why your watch marks up. The hardness numbers for every common watch material, and why every Wren case and bracel...
Which Wren
Making
Facet the top of a sapphire crystal and leave the underside a smooth dome, and the dial warps wherever a facet crosses it. The Vessel cut...
Making
The first run of Vessel crystals came back with a 95 percent failure rate. Our first manufacturer declined to try again. This is how the ...
