Jaeger-LeCoultre · Manual Wind

849A SQ

The 849 opened up: the same 1.85 mm hand-wound base, skeletonised down to 119 parts from the solid movement's 123, with the exposed bridge surfaces engraved and decorated. It drives the Master Ultra Thin Squelette. Removing that much metal costs a little running time — the reserve falls slightly against the closed 849 — while balance and hairspring carry over unchanged.