The Patek Philippe Nautilus Moonphase Steel Blue Dial 40mm ref. 3712/1A-001 is a sophisticated complication housed in the iconic Nautilus design. Its 40mm stainless steel case showcases a sleek bezel and is paired with a deep blue dial featuring horizontal embossing. The dial incorporates a moonphase display, a power reserve indicator, and a subsidiary seconds counter, all laid out with precision for intuitive readability. Powered by the ultra-thin Calibre 240 selfwinding movement, this watch offers a 48-hour power reserve and is built with 29 jewels for smooth performance. The stainless steel bracelet, with a matching deployment clasp, ensures a secure and comfortable fit. The sapphire crystal protects the dial while offering a clear view of the intricate details. This Nautilus model is a perfect blend of functionality and timeless design, making it a standout choice for collectors and enthusiasts alike who value both performance and craftsmanship.