Jaeger-LeCoultre Master Ultra Thin Perpetual Calendar

At just 9.2mm thick, the Master Ultra Thin Perpetual Calendar by Jaeger-LeCoultre distils high complication into a classically elegant 39mm pink gold case. Around 60 brilliant-cut diamonds encircle its eggshell dial, where the perpetual calendar’s indications—date, day, month, year, and moon phase—are laid out with exceptional clarity and symmetry. Inside, the in-house calibre 868 powers the display with a 70-hour reserve and automatic winding, visible through the sapphire caseback. Refined dauphine hands, applied hour markers, and a polished pin buckle in matching gold complete the understated execution. Fitted with a black alligator leather strap and interchangeable system, this timepiece is a masterclass in discreet complexity and timeless finesse.