The Jaeger-LeCoultre Master Ultra Thin Ref. 145.2.79 is a masterpiece of understated elegance and technical prowess, embodying the essence of fine dress watchmaking with its ultra-thin profile and timeless design . Housed within a refined 34mm 18K rose gold case measuring an astonishingly slim 5mm in thickness, this watch is a testament to Jaeger-LeCoultre’s mastery of miniature mechanics and pure form . The silver-toned dial provides a clean, classical canvas for the applied baton hour markers and elegant dart indices at 3, 6, 9, and 12 o’clock, which are paired with distinctive two-tone dauphine hands, frosted on one side and polished on the other for a subtle, sophisticated light play . At its heart, visible through the sapphire crystal caseback, beats the legendary manual-winding Caliber 849, one of Jaeger-LeCoultre’s thinnest movements, boasting 19 jewels and a frequency of 21,600 vibrations per hour, while its meticulous finishing of Côtes de Genève and circular graining pays homage to the manufacture’s 180-year history of excellence . This horological rarity is completed by a luxurious black alligator leather strap and an 18K rose gold deployant clasp, offering both comfort and security for the discerning wearer . Water-resistant to 5 atmospheres and presented with its original box and papers, this Master Ultra Thin is the quintessential choice for collectors who appreciate the quiet confidence of a true dress watch, perfect for any occasion where sophistication and tradition take center stage . Key specifications: 34mm 18K rose gold case; silver dial with baton markers; manual-wind Caliber 849; 34-hour power reserve; black alligator strap with rose gold deployant buckle; 5 ATM water resistance; sapphire crystal front and exhibition back .