The Master Ultra Thin Perpetual by Jaeger-LeCoultre is a testament to the brand's craftsmanship in creating refined, elegant timepieces with highly complex movements. This model, launched in 2013, houses the automatic Caliber 868/1, featuring a perpetual calendar mechanism that accurately displays the date, day, month, and year in leap years, alongside moonphase indication, all within a remarkably slim profile. Encased in stainless steel with a 39mm diameter and a mere 9.2mm thickness, it is designed for optimum comfort and understated sophistication. The watch is water-resistant up to 50 meters, ensuring durability without compromising its sleek design.