Jaeger-LeCoultre · Manual Wind

849

At 1.85 mm deep, long the thinnest hand-wound movement in production, and the direct descendant of the 839 of 1975. Its 123 parts leave no room for a rotor, which is rather the point: the calibre exists so a mechanical watch can be made almost flat. A Glucydur balance and flat Nivarox hairspring regulate it, with Côtes de Genève on the bridges.