Jaeger-lecoultre Master, model: 1552520 Automatic mechanical Perfect Single watch, extended warranty 18k rose gold 39mm. Layout distinction: Month (AUG) at 3 o 'clock, day of the week (THU) at 12 o 'clock, outer circular date scale, moon phase small seconds dial at 6 o 'clock. The combination of digital hour markers and triangular three-dimensional scales makes it highly recognizable. 2. Detailed craftsmanship: The moon phase dial features a deep blue starry sky background, complemented by a dual-color moon in gold and silver. The hour and minute hands are rose gold princess hands, presenting an overall retro business style. 3. Adjustment logic: The full calendar does not require manual adjustment of the large and small months every year. The movement automatically recognizes the 30 / 31-day month. Only the leap year of February requires minor adjustments, making it highly practical.