Above the tree line, frost takes batteries, storms rewrite maps, and thin air steals clarity. An expedition watch answers with over-engineered gaskets, shock-proof movements, and lume that ignites through blizzard whiteouts. Screw-down crowns anchor your time against altitude swings; 24-hour hands guide you when sunrise and sunset blur. Scratch the case, dent the clasp—the calibre marches on, indifferent to scars. Strap one over a down parka and you carry a silent sherpa: steadfast, uncomplaining, ever ready for the next ridgeline.