Housed in a 40mm cushion-shaped stainless steel case treated with a PVD/DLC coating, this Nautilus 5990/1A-001 features a grey dial with luminescent index hour markers and luminescent hands. A scratch-resistant sapphire crystal protects the dial, while a sapphire-crystal exhibition caseback reveals the movement within. The fixed bezel and fold clasp bracelet complete the characteristic Nautilus silhouette.
At its heart beats the caliber CH 28-520 C FUS self-winding movement, delivering chronograph functionality with a 60-minute counter, dual time zone display with day/night indicators, a local date hand, and a sweep seconds chronograph hand. The movement offers a 45–55 hour power reserve, and the watch is water-resistant to 120 meters / 400 feet.
This example carries the customization of a professionally applied PVD/DLC coating and has never been worn following that process, earning it a pristine watch condition rating. It is accompanied by its original box and original papers, making it a complete set for the discerning collector.
