Experience the craft of Jaeger-LeCoultre in the Master (ref. 1663417), a contemporary classic shaped by careful watchmaking know-how. The exterior is thoughtfully executed: crafted in white gold and measuring 43 mm in diameter, with a thickness of 13.3 mm, defined by a round silhouette, paired with a gem-set bezel. The caseback is open, and the crystal is sapphire, delivering water resistance to 5000 meters. At a glance, the dial balances texture and clarity: a white tone, executed in mother of pearl, framed by stick / dot hour markers, and alpha hands. At its heart beats a proven engine: the 978 caliber. With considered ergonomics, it feels composed during extended wear. Brushed and polished elements play with light to emphasize crisp geometry. For buyers researching specifications and real-world impressions, this reference stands out for coherent design, dependable mechanics, and lasting relevance within modern horology.